non existent service, double debit, ***** on acc

I have been double debited on the 15th June, this debit order is for last months account and the amount due on the 30TH JUNE!!!!! I am also expected to send them proof of payment so that I don't get debited AGAIN at the end of this month... Telkom are more than happy to take money from clients and not provide customer service. I logged a query with regards to a ********** increase spend limit on my account in February, I had to phone once a week to get feedback (with no success), no one knew what was going on I eventually gave up on this when I was getting told that technical cannot find the call logs for that day, last time I spoke to them they said the limit was increased in December and they could not tell me on what day or from what IP address... yet I can get a bill where they are more than happy to make me pay for ********** activities on my account.... I begin to wonder if Telkom supports ********** activities in order to make more money.