Breach of contract

Good Day<br> <br> I had started a new contract with Telkom in May 2015. My account was then debited in June which was normal since I knew about the contract. However in July or August I realised my account was suspended and found it odd. In September I called the customer care line regarding this issue and also realised my bill kept increasing. Telkom then realised they had captured the incorrect Banking details for my account they had another persons banking details. I had asked them to rectify this. as of TODAY 16 Nov they have not done this. My account is suspended meaning I have had no access to there services but they are still billing me. I find this extremely unfair and unjust. My bill is sitting at almost R700 for THEIR error and they expect me to pay even though I had called on numerous occasions asking them to fix my banking details. How can I pay for something that is not my fault and services that I never received. I want to pay for only the services I used but from date of suspension they should exclude. They have not returned any of my calls made to them and my case number is ***2 <br> if they do not exclude these payments they must cancel the contract