Contract not cancelled

I have cancelled my contract numerous times with no success. I called in to find out how to cancel the contract and I was told to visit the branch. Went into a branch to cancel and a month later it was still not cancelled. I called in to query and I was rudely told I cannot be helped online I need to go in to the branch. After going in to cancel once again and not receiving feedback I contacted Telkom again to be told they will follow up. I later received a call to say my contract is cancelled but have since been billed for another month.