MTN Debitted money i was not aware of

I have had a contract with MTN since December 2019 and paying R1000 including cellphone insurance. Then February I took a sim only which I use for my Router. Then my bill went to R1200. All of Sunday in July I was debited R2200 when I enquired the Consulted said it was re-occurring data bundle on the sim in my router. I told her I have never asked for that. So she logged a ticket for my money to be reimbursed. At it was never reimbursed and then called them again and another Consulted told me the money has been credited to my MTN account and no debit will go off for August as I have credit. Well come month end August the debit of R1200 came off. I then made enquiry again to why the debit but I had a credit and I was promised that no debit will go off. So the consultant told me she has escalated the query to Billing of some department to get this R1000 deposited back into my account as I am no longer interested of this money to be a credit but rather deposited into my account.

If this query is not sorted out to my satisfaction I am canceling my sim connection. and I have no choice to wait till my contract expires in order for me to cross the floor to another network provider. I am really not satisfied with MTN.