cancellation query

I have 2 cellphone contracts with Telkom, I want to cancel both of them and i sent 2 cancellation forms on the 3rd and 5th January 2016 respectively. I was advised it can take up to 21 days. During those 21days i called Telkom a couple of times to enquire but all i got was \don't worry sir 21days haven't passed, we'll call you\". I called again on the 26th of Jan 2016 and was assisted by a friendly agent, Smiling Soboye, who made an effort to contact the cancellations department for a feedback and it was only then that they sent me an email apologising for the inconvenience and said some1 will call me, till 2day no1 has called. I called in again today, 03/02/2016 and was advised I'll receive a called before the end of business day 2day but still nothing. I've had enough with Telkom and their very bad service and i just want my contract to be cancelled because i feel they are delaying the process on purpose so that they can rob me more of my money. I mean i just don't understand why a simple cellphone contract can take more than a month to be cancelled. They really need to go back to the drawing board and i demand an answer before the end of business day tomorrow coz I'm fed up"