TELKOM CONTINUES TO BILL AFTER CONTRACT HAS EXPIRED

I have been with Telkom for the 6 out 10 years that they are recently celebrating. I must say that their service has been pathetic. I had a month contract them which meant to cancel when on the 24th month but they decided they'll renew my contract without my knowledge or consent for a further month to month contract. Upon finding out that my contract had long ended and was renewed automatically to a month to month basis, I requested for the contract to be canceled and yet they didn't. Instead, they kept billing me and because i was being debited every month I kept using the service as opposed to reversing the payments with my bank and end up incurring additional charges. I also noticed that my data wouldn't switch to night time usage after 12 midnight and that was depleting my data fast. I notified them and they said they'd look into it. Long story short, I have a data contract that I am being billed for after cancelation and I am still not enjoying the service. I have called through their call center which is useless really because the agents are rude and hang up on you. When you request to either speak to a superior , in a position to make changes, they hang up. It's been 6 months dealing with the same problem. For a brand and organisation as reputable as Telkom it's pathetic. It's concerning especially reading the reviews on here that they really do not care about their customers .