Cancelled contract not cancelled

Basically I cancelled my contract on the 29th January 2015. Too my bad luck, my contract was not cancelled. Nu debt management contacted me and said I owe Telkom money. I informed them that I have cancelled my contract and emailed them the copy of the cancellation form I received when canceling my contract at the store. I was then contacted twice by different Nu Debt agents.Then some how they debited my account, I canceled the debit, contacted Nu Debt and they advised I need to contact Telkom. I received online help and the customer service guy said I need to go to the store to resolve the issue. Too my luck, the consultant that help me the first time was on duty and helped me again. His excuse was they could not get hold of me, yet the NUDEBT agents was able to contact me on 3 times and Telkom has my Postal Address and email address.<br> My contract was canceled today, I received a call from a Telkom agent and his excuse was, they could not contact me, very poor excuse. Anyway he said I need to pay the outstanding amount, come on now. I did my duty and done what was needed. Why should I pay, your process is at fault. I would never recommend Telkom mobile again<br> Case ***