Furious with MTN service.. Daylight theft

I did an upgrade end of January 2021 telephonically and phone was delivered . 1st of March my account was debited with an amount of R1196 and again on the 15th debited with another amount of R514. Only to find that the amount of R1196 was incorrectly billed to me for someone else's account. I have been to the MtN store at the Glen where a consultant verified I was billed incorrectly and I have forwarded my bank statement as well as MTN statement to them as they had no record on their system reflecting the incorrect amount of R1196 billed to my account. To date I am awaiting for an MTn consultant to get back to me regarding this. J have called numerous times to MTN queries and they keep referring me to escalations with reference numbers I have on hand to sort out this issue.. Each time I speak to a consultant telephonically, I get a crazy excuse that just have canceled my contract, then told that they have not billed me as my statement does not reflect that amount deducted but I have proof that the amount is deducted from my bank account. They have paid someone else's account from my side. Is this not *****. Speaking to a consultant is extremely frustrating as they refuse to look into this. Now how many times should I go into the store to get answers only for them to keep passing the buck.