Appalling Service from Telkom

My Father took out a pocket router with sim from Telkom about 2 years ago. He had asked then to deduct the fee on the 15th of every month, this never happened from the start they would deduct when they felt fit. He was initially supposed to pay about R200 but every time they deducted more than what they were supposed to. He had been trying to get hold of them and every time he tried they kept saying he must call Techzone as they were the ones he dealt with. He asked them for a number for Techzone but they could not help. He has informed that they were the company that called him for the package on behalf of Telkom so why cant Telkom help him out., they could not answer that. He then stopped paying them because he was not getting any response from them, he never got statements or anything. His last payment to them was May even though he stopped using it. After that he stopped the payment, but they just reinstated it and deducted again without anyone calling him to find out what is happening or why he stopped the payment. The service from Telkom i appalling. How can you want to get clients but you treat clients this way. Telkom is the worst as they say they cannot help but yet the contract is a Telkom Contract.