Frustration and non consistants of mtn

I have been using mtn for the past 16 years and I was happy. My experience with them changed ever since I signed up a Data contract with them, my account with not debited, I called and asked them to debit they told me they have scheduled for the debit. Each time I made a follow up regarding the debit order, they kept saying the same thing but disconnected my device. Months passed by requesting the same thing to a point when I requested an account where I can make payment, nothing happened. Only to be called by lawyers regarding the account. I called mtn inquiring about this, they then sent an sms to for me to make a payment of R941. 80 and banking details. I payed R950 and requested that they reactivate the account. I was given days to clear it and kept making follow ups, then was directed to go Rica the Sim card at an mtn store. To my surprise when I get there I am now owing R100 and something, I called and that was told that after days of calling and always being told the account is cleared. I am so unhappy with the incompitancy of mtn and it not the first time encountering a mess with this contract, things change every second at mtn