Pathetic customer service

I have taken out a contract with telkom mobile. This was the worst thing I could have t=done. Customer service is terrible to say the least. I have had money in my account every month for the debit order to go off. This has not happened. Then every month I have to follow up with them because they say my account is in arrears, but it is because they dont take the money out my account. Then they suggested to me to change the debit order date from the 5th to the end of each month that things will be better, I changed it and the next month the debit order still didnt go off and guess what....I was in arrears again and again I had to manually pay them. Now this month the correct amount due should have been deducted at monthe end and again not take, When I phone to find out what went wrong I was told it is now my banks fault as there is a dipute on Telkom which is not correct. There was no mandate sent to Tymebank for the debit order, they have not even tried to debit my account for them to see that there is a "dipute" which there is not. This has been confirmed by the bank. This is pathetic to say the least.