MTN *****ulent billing

I have been with MTN for years now.

Due to financial difficulty I had decided to cancel my data contract and only keep my cellphone contract. My contract was supposed to end in November 2023. I had been to the MTN Store at Chatsworth by the Pick n pay and was told to phone the call center to cancel the contract as they can not do that in store. I had called the call center to cancel it where I was told a 30 day notice is to be given and they have proceeded with it, no where was I told they would contact me before canceling the contract. I had received numerous calls from MTN to upgrade my contract and I said no as I did not want to. The following month I see the data was given to me as normal, I had informed the consultant at the Pick n Pay MTN Store in chatsworth about this. He said he was going to see what is going on. Till December 2023 this has been going on and no help from them consultant and I am being charged a ridiculous amount of R1500+ for a data contract, which is just madness. When I queried this amount I was being told that there is 2 contracts under the cellphone number that the data contract is on, how is it possible to have 2 contracts under the same number?because when we go into the store to take contracts they say you have get another number. The consultants are forever happy to assist when you are taking a new contract, but when it comes to queries like these they do not care. This is totally *****ulent om MTN with the billing and I will not be paying R1500 for a data contract. Please can someone assist me what to do, as to date this is not sorted out. And I am being told that the account is handed over. My cellphone contract number is completely blocked and that is my main number. After this MTN has just lost another valued customer.