Telkom unprofessional and incompetant business conduct

I was on a month to month contract with Telkom and sent an email to notify termination of service. I also called about 6 times and was on hold for an average time of one hour to notify of cancellation verbally . After four months of paying my account so that it will not affect my credit record I decided to stop paying and to not give in to Telkom's bullying. Now my credit record is affected!!!! This has to stop as we as consumers also have rights - we have to stick to the T&C's and so does Telkom. Furthermore the lawyers (DC Fourie) handling Telkom's are biased and do not abide to the T&C's of contracts