Utterly disgusted by the service recieved from Mass mart Credit RCS

Recieved my money credit card as of may 2019 with a credit of R50 000.June,july,august,September and October I made payments of either R100 or R50 every month cos I had to pay R56.49 for monthly main card service fees.october statement showed in black n white Credit available R50,061,29.I recieved November 12th 2019 statement showing R50,704,80 showed payment R100 and Payment R600 so I did not bother, thinking my husband paid an extra R600.December 4th 2019 I made a purchase at clicks for an amount of R456,54 cos I'm under the impression i have a credit of R704.80 so i recieve a message showing me I owe Mass mart RCS credit card R405.29 so I was so confused at what i was reading so I called MassMart RCS credit card on the 4th December 2019 on ***spoke to an agency after asking me to confirm my ID number, Cellphone number, Residential address and Email address.After supplying all the relevant information to the agent I stated to her that I have a credit of R704,80 and I purchased at clicks for R456,54 so I should have a credit of R248,26 and not R405.29 then the lady says to me no you owe us R405.29 you do not have a credit owing to you.I said mam listen if I have for example R500 credit and I purchase for R250 I should have R250 owing to me she says to me no you will owe us R250 then I laughed n said gosh this 30% pass mark for maths is not gonna help us customers she stated I should hold on she needs to ask her supervisor a question so i waited and waited almost 5min then she comes back online and says to me the manager will call me tomorrow 5th December 2019 with further information, i say to her but it makes no sense she says yes the manager will call me.2 days pass manager never calls as usual so I called in 7th December 2019 and spoke to another agent explaining the situation again about my credit but I owe you guys money so she says she needs to do investigate this further and so I was put on hold again for about 7min then the manager comes online his name Marshall Bruiners told me that they need to investigate this matter further as this makes no sense as on my statement shows a credit owing to me and that I had made a purchase so how can I owe them.I was told by the manager that he will contact me once he has more information.The manager Marshall Bruiners never contacted me not once via email or phoned me I always had to follow up by calling the call center and when Marshall spoke to me 19 December @ 14:36 pm he said to me that he did do an I investigation n found that apparently the bank took my payment of R600 as a purchase on my account and I'm like oh k but how is that even possible and marshall is like unfortunately it's the bank so I said to him ok now what he states that as soon as his finance department gives him the go ahead he will refund me whatever is due to me so I said ok pls do that refund and close this credit card cos it has caused alot of headache and we both agreed he had my details for refund n I cut the call.Called Marshall again 14 JANUARY 2020 n I asked him so why is my credit card not cancelled as requested in December 19th he said he needed my banking details so I gave it to him n he assured me refund was going to be done within 5-7 working days.Called marshall again today 27th JANUARY 2020 I said listen now I'm really ****ed off cos mycredit card is not closed n no refund done so Marshall says to me that he was informed by his finance department that I need to send them my bank statement to show proof of payment of the R600 so I said ok when did you receive this information from your finance department he said on the 14th JANUARY 2020 late afternoon then I said ok why did you not contact me he said he went on leave ok how many days leave Marshall he said 3days I said ok 14 + 3 = 17 days and today is the 27th so that's 10 days you had to contact me he says I must consider the weekend as well so I said to him dont f##$$ make me a stupid marshall you did not blady contact me anytime I had a query on this credit card then says well I need to send my bank statements he never took responsibility for his unprofessional behavior by not contacting me anytime be it email or phonening me he never not once said he was sorry or that he was wrong.I told him why must I prove my innocence n inconvienece myself by sending nanking statements.i cut the call on him.Marshall Bruiners is an *********** so called manager who is blady lazy and only pushes the blame on the bank.Marshall bruiners does not know how to treat a client with respect. Marshall Bruiner did not once try contacting me with Information regarding the investigation wich took him almost 2months to complete. Now my December and January statements shows I owe them R101,00 for late payments R7,51 Debit interest yet my statements were under an investigation. December statement shows R600 was reversed into another account number but yet they put R1,056,54 (R600 reversal + my purchase at clicks R456,54 )as a purchase on my account wich is ***** from The credit card department.If Marshall Bruiners only spoke the truth to me after I brought this to his attention and said his finance department *****ed up all this unnecessary stuff could have been avoided but Marshall Bruiners needs an award for being an arrogant, disrespectful **** who does not care about customers.