Contract Expiry and Cancellation

My contract with Telkom Mobile lapsed in November 2015. I have put countless requests to cancel the contract. Over 3 months later after promises and promises the contract is still not cancelled and I am still paying for it. The level of service is appalling, I am being taken from pilar to post and promised feedback each time with that not happening. I have even decided to cancel my other contract with telkom to move to another network as the service is terrible, even that cancellation process has not happened. As a client I am extremely frustrated and disgusted at the level of service. When the contract was initiated it was quick but now that it was lapsed, its impossible to cancel. I advice anyone not to take up any contract with Telkom Mobile.