Bad Service from MTN

I've received bad service at MTN since I changed my debit order date,MTN has been giving me tough time...Last Month on the 23rd I called them to check if they did receive their payment since I did not receive any notification at the bank,I was adviced by the lady who was assisting me that the payment is reflecting on their side.Last week on Tuesday I woke up with my phone being blocked from making outgoing calls,I called them the whole day and every agent that my call went to told me that they are off line they can't assist..The other agent told me that all Capitec clients have a problem of returned debit orders as capitec reversed the debit orders.I went to Capitec to enquire and the lady who was assisting me said they don't know anything of that kind.On Wednesday, still my phone is blocked I called MTN then I was advised that I owe R1605.32 when I asked them about such a huge bill because according to my knowledge I have to pay MTN R560.00 for both my contracts.They told me that I haven't been paying since October 2020 and I was suprised at how can they give me full service for 3months without notifying me that the account is in arrears, I requested the lady who was assisting me to removed the suspension on my phone a take the money from my account,she said that won't be possible because I owe three months, she said I have to make a payment first...I was then advised to go to an MTN store to make a payment for my line to be active immediately. I went to MTN Heidelberg Mall ,their swapping machine was not working,the guy who works there gave me ABSA banking details and he unblocked my phone immediately before I even went to the bank"The best Service I got from MTN Heidelberg Mall",I went to the bank to make a payment of R2000.00...To my suprise yesterday on the 13th January 2021 I got a sms of MTN debit order for the amount of R1605.32.This month I have paid MTN R3605.32 for the contract of R580.00 .Now I called them this morning and I was advised by Palesa Legodi that I will get my money by Monday,I want to use that money over the weekend,now I have to wait for them. she said on the system it shows that I authorized a debit order for the 13th...I requested the debit order but I was advised that they won't do it I have to go to the store....MTN 's service is very poor they don't have the interest of their customers at heart all they do is to milk their clients.