MTN-Pathetic service and unresolved queries

I have to major issues with MTN. Firstly, In December 2020 I upgraded one of my MTN lines that was due for upgrade which is a sim only deal that I upgraded in store in Newcastle kzn. The package that I upgraded to is R399 per month which includes 400 minutes and 41GB data.My bill run date to receive the data and minutes is on the 17th of each month.I understand that December was not a full month therefore I only received some data and minutes.However on the 17th January 2021 I received the 400 minutes but only 25GB data and not 41GB data as per my contract package deal.So MTN gave me 16GB less data.Secondly, at the end of December I was debitted R1057.67 and at the end of January I was debbitted R863.83.I have two lines but that is R748 per month so why did they debit me no much in December and January yet they did not even give me all my data in January. Since January I have been given absolutely pathetic service or should I say no service at all from the MTN store in Newcastle!!I have been dealing with them telephonically since the 17th January and emailing them since the 8 February and today is the 26th March and they still owe me data and they haven't sorted out my billing queries! Then on the 7th February MTN gave me 6.45GB promotional data for the data that they gave me short in January.But 25GB and 6.45GB does not give you 41GB!!So where is my 9.55GB data they charged me for but until today I haven't received it or been credited for it. On the 17th Feb the MTN store emailed me to say they received feedback stating that there is no credit due to me and nonsense about VAS services, whatever that is supposed to be.What a joke.So a big Company like MTN feels that no credit is due to a customer that was debitted the full amount and more for data they did no receive?And then on the 22nd Feb the store emailed the feedback that they received asking if I want the missing data or credit.I told them that I want my missing data and they need to tell me why they debitted so much in Dec and Jan and still credit for me that.Up until today I am still waiting for both. All the store says is that they are waiting for feedback.3 months for feedback?What is so difficult to give me my missing data and correct my billings for the two months that they over charged me and credit it?I will gladly show you all the emails that have been going back and fourth from the MTN store and myself.And the reason that I am giving this review today is because as stated in my email to the MTN store last week Thursday, I told them that if they do not give me any feedback as to what's happening on the 19th March at 12pm then I will take it up and guess what....They still haven't contacted me up until today after me informing them that I am going to.It shows that they don't care.And MTN clearly does not value customers.I would like to be contacted and I have all the emails for these 2 or 3 months.I am disgusted with the pathetic service and the fact that I still haven't received my missing data or credit.These past few months have been a misery and nightmare trying to get this sorted with no interest or action.