REFUSAL BY TELKOM TO CANCEL MY MOBILE CONTRACT

End August 2017 I went to Telkom store, at Vincent Mall, East London, to cancel my contract ( ********** 858), whose term expired June 2017. I submitted literally everything they required of me. I was assure the cancellation would be effective in a matter of hours, which never happened. I went there again end September and they could not trace the cancellation on their systems and made me sign fresh forms- with Ref. ********** 0. Until now there has not been any progress. I did an online cancellation again on 4 October to ********** and ********** - (Dineo Nkabinde). Nothing has transpired. Meantime, they continue to bill me. What do I do ? This surely is not good customer care.