Account Not Closed

In January I went to the Telkom Store in Kenilworth Centre to request that close my contract which had long expired. I filled out the forms and gave them a copy of my ID as per their requirement; however yesterday I called and I found out that my account is not closed therefore I will be billed at the end of this month. Great isn't it, after all the trouble of taking time out to go to the store and comply with the requirements, they still don't process your request; they're just happy to bill you continuously