Cell Phone Contract Cancellation Difficulties

I'm trying to assist my brother who has a problem with Telkom, which has been going on for a very long time, almost a year to be exact. He had/has a contract with Telkom which started in April 2013 and was supposed to end in March 2015, but it has been a roller coaster ride trying to cancel it. The cell number he was using on the contract is ***. Telkom refuses to assist in cancelling this contract, the Helo Peter route is the only remaining option right now. He has sent a lot communications, including faxes, trying to cancel this contract, but it looks like they are doing this deliberately, hence the debit orders keep going through, and through it all, he has to reverse them, and that's very costly. Some of these companies you will regret ever going into business with them.