Mtn SA will Rob you stay away

I took out a data contract for R299 with MTN at wonderboom Junction on the 12th February 2020 and from March 2020 I started seeing upnormal billing loaded to my bank account and visited the mtn shop were I was given complicated explanations. 1. Their calculations on pro rata are not making sense. 2. Their pro rata costs more than monthly subscription 3. I have send numerous emails to mtn customer care and my issues are not resolved till today. 4. I was paying R299 every month and they decided to block the sim card because I didn't allow R809 debit order because it was not right. 5. Not even 6months with MTN and my query not resolved, I wasn't given a cancellation fee amount to pay NOW THEY HAVE BLACKLISTED Me!!! People must stay away from MTN SOUTH AFRICA IS NOT A GOOD COMPANY, THEY *****ED MY CREDIT RECORD WHICH IS NOW AFFECTING MY INCOME BECAUSE MY JOB REQUIRES ME TO HAVE A VEHICLE WHICH I CAN'T BUY BECAUSE OF MTN SA.