MTN worst contract

Changed my debit order to EFT payment as MTN changed my debit order date from the 1st of the month to the end of the previous month and then had my debit order bounced as no money available on 29 June. I paid via EFT on the 1st of July and requested to pay via EFT in future, had my line suspended mid July again and after going to visit their branch it was re-activated as the payment was on the system. My line has been suspended again because I haven't paid my account due on the 1st of August???????????????? Phoning the helpline will just let you get a stroke as explaining to MTN that they are in the wrong is impossible.