Still Being Charged for Service I've Been Unable to Use Since July 2017

I moved premises at the end of August 2017. I app**** to have my line moved in July. End August came, it didn't happen. I app**** a further 2 times during September, still didn't happen. Eventually, becoming fed up at being charged R600 for something I was no longer able to use, I sent through my service cancellation request beginning of October. End of October I wasn't debited, so I assumed the cancellation was successful, but this month I've again received a statement for my account to be debited end November. I am at the point whereby I'm going to have to stop the debit order at my bank because Telkom is *******ly charging me for a service I can no longer use, at an address where I no longer reside! Stopping the debit order will affect my credit rating! Call centre, store staff and online consultants have all been absolutely useless! Please can someone assist me?!