A bad telecommunications company

Iam very disappointed by this service provider. Their customer service is appalling including their consultants, who are always defending and fighting as if it's their family business. I have struggled to cancel my business mobile contract and ADSL lines for two years now. Telkom has the nerve to bill my account for services that I have never received. I have been calling and doing queries but nothing has been done. I managed to cancel the wifi contract this October, and paid the outstanding amount. But still they tracking my account for the amount I paid, I specifically asked them to cancel the contract but wanted to retain the number to use for my wifi. That hasn't been done still, I called them the past week on Thursday. I was taken from pillar to post by their rude consultants. This one consultant helped me and promised that her manager will solve my query but till today the simcard is not opened. And today again they tried to debit the same amount I have paid. Because I'm avoiding to incur interests so who's going to pay for those interests has I have paid. Yooo Telkom is pathetic and is not even trying to communicate with its clients.