Bad service from MTN

I am very saddened by the service I am getting from MTN after such a long time with them. I have just upgraded my Data SIM card and am for the 1st time after 5years am being told there's a pro-rata for extending a contract. I got a bill for R 3278.75 last month. I called in and was advised that there was a problem with the upgrades and am not the only person experiencing this. I have upgraded the same contract over and over and I never got this. I noticed they were charging me for local content of which I never use it's a data SIM, and if am to call with it they charge it month to month. Right now my bill is said to be on the 4 thousand and some odd change range.

Am displeased with this, service is proving to be dreadful and draining. And till today no response yet they now want to debit 4000 before fixing the initial mess.