Telkom incorrect billing

I moved out of a rented house last year where we had an ADSL account with Telkom. I therefore sent a request to terminate all services on 30/10/2017 and received a response saying that my request had been processed. As expected, my internet service was cut off on the 01/12/2017. I then received a bill for the period of 01/12/2017 to 08/12/2017 without receiving any service for that period and for an amount greater than I would usually pay for a full month.

I sent a Billing enquiry on Telkom's website on the 12/01/2018 and they confirmed receipt of the dispute and said that it would be resolved. Ref. number: ********** 0

I again received an invoice in January and visited a Telkom outlet on the 08/02/2018. One of the staff assisted me to contact the call center and I was told that the error was dealt with. I received the dispute reference number: ********** 8.

I continued to receive invoices until July and contacted the call center again. Thozama assisted me and said that my dispute had been escalated.

It is August and I am still receiving invoices (with late payment penalties).

Telkom, how do I get this sorted?