Credit collections and call center no help whatsoever.

My debit order did not go off on the 1st of the month, I made a manual payment that same day. I received a payment received notice on the 4th saying my payment was received. My line was suspended on the 15th due to non payment. I phoned was on the line for 15 minutes got cut off. I send through 4 e-mails with their mail stating payment received as well as a proof of my payment made the 1st. They rep**** twice saying debit order rejected they are awaiting payment. I do not know what else to do to get my line active. They obviously received the money but have not allocated and just suspended my line. I will most definitely find another service provider, we are using a Cell C line but I will be cancelling that.