I would never recommend renewing mtn contracts. Out of bundle ****

I recently upgraded my contract with mtn at greenstone mall. It was meant to be R1139 for s23+ package that included data and minutes. After signing the contract i was told that the copy will be emailed to me but it never happened until a month later when i went back to the branch. The initial debit order was above the contract debit amount but i was told it included renewal fees, etc. But the 2nd and 3rd debit amount jumped to a total of R8080. I went back to the same branch where I got the phone. The lady told me that she will send and email to query the amount becauseshe also didn't understand. The response she got was that it was out of bundle data and minutes For the past 9years since my first contract i had never used the out of bundle services from mtn. I have lodged a complaint, sent an email to ***** department, and more than 20 days later I still don't have a valid explanation instead I'm being threatened to pay or else they will list my account on the credit bureau. I strongly believe that mtn ***** people's money by deliberately not explaining their contracts and the trap of out of bundle services and ruining credit score of many people