Debit orders after contract expired

I have a terrible experience with telkom mobile through out my 24 month contract with them. On 17 October I went to the rosebank telkom shop to cancel my contract , I was told the turn around time was 21 working days. Today it's the the 8th of January 2018 my contract has not been cancelled yet. My contract actually expired on 17 December 2017 but they are debting my account. I have called the customer care and they tell me they can not refund my money nor can they cancel my contract I have to go back to the rosebank telkom shop to get another cancellation form. These people know my contract already expired and are too lazy to do their jobs and contact their rosebank shop. They are indirectly forcing me to stay in an expired contract and keep debting my account and refuse to refund the money they stole from me. All I want is for my contract to br cancelled as it has expired in 2017 and I filled in a form in October. I want my refund back so I move to a better and competent network.