TERRIBLE SERVICE for 2 months now

In August I got a new contract, and my data was transferred incorrectly, leaving me with nearly no data. So me, needing my phone I continued to use my data at an extra cost. A MONTH later Cell c finally decided to credit some data for me. With this said I had issues contacting them the whole month. In any case. in the start of September I was still talking to the regional sales manager (Marc) saying I do not feel i need to pay the extra money on my contract because it was their fault i was using extra data in any case. Safe to say, Marc has still not come back to me and ignores my sms's. Yesterday the amount went off my bank account. so i sent him a message, and still - NO reply. In my opinion this is *****ING. I do not think its fair, and i gave them more than enough time to work it out. I'm actually disgusted, and its heart breaking that someone can give such terrible service. ( I am well aware the Sandown branch now closed down - that does not mean the client base does not exist)