Telkom con artists

I cancelled my contract with MTN for their bad service and took a contract for me and my fiancé on the 24th December with Telkom and got pro-rata of data and got the full amount in January. When I got the bill it was R635 which they tried to debit on the 15th January yet I told them to debit his account on the 31st of every month. End of January we paid it cash. This month we get another bill and its again R635 I went to the store and it was determined that I am being charged an extra R40 on each contract and also I am charged an amount of R250 for a debit order that bounced now how is that any of my fault when I asked for the last day. I went to the store and was told someone will call me so I get a call from Tsiamo and he is clueless and says he cant access my account so I ask for a team leader and he hangs up in my ear. He then calls me at 7.45 and I miss the call. this morning I call Telkom and talk to Nkosikhona and I am told they will log a dispute and send me a case number I'm still waiting. 2 months and I'm already having a headache with Telkom. Can someone call me from Telkom I am not going to pay for something that's not my fault.