Vodacom in breach of contract.

Hi I am having immense problems and no solution has been done. Vodacom has done a double upgrade to my account without my consent. I had agreed to pay r600 a month but I am continuously being charged more than that with different amounts each month. Was promised it be sorted out but it is now September almost October and has not been rectified. I am continuously being called that I owe money yet all call logs made then being told sent to wrong departments and promised to be emailed as I'm on the road frequently working and can't take calls on the road all time. This has been going on from July!! First time such poor service and I been with them from 2005 with 5 contracts. When I do answer the calls it just cuts off! Basically I have a working phone so they shouldn't use my phone as excuse for it cutting off!!