Cell C

After months of me calling Cell C to cancel a contract, cell c is still trying to debit me for the contract they didn't cancel when i requested. They handed my line over to another company as my service provider no longer making Cell C my service provider, (Both parties agree my service could not be cancelled or handed over while my contract was in arrears, So after paying what was required so i could have my line transferred, i fail to understand why Cell C is still charging me?) This has been ongoing since October 2018 it is now March 2019. After being asked for my details by a representative of Cell C on the 1 March 2019 so they could contact me to resolve the matter instead i receive a message requesting payment still for the incorrect amount. Despite being given various reference numbers there never seems to be any real resolve.