Telkom Wifi contract no service received no response to problem

Since 13-Dec-17 I have had no Wifi, I phoned the call centre, billing, technical and sales department, emailed the complaints department and I visited the Walmer Park branch to report the problem and hopefully get a solution. At one stage the call centre said there is nothing they could do I must just be patient, this after almost 3 weeks without service. On 29-Dec-17 I decided to cancel the contract as I was getting nowhere. On 8-Jan-18 I received an invoice for the full month and got a call from Telkom saying they cannot cancel the contract if I do not pay the outstanding amount. I requested a credit note for the period I did not have any service and agreed to pay the balance as soon as the credit is passed. The deposit they still hold will cover the full amount still outstanding after the credit. I have to date not had a response to this. I have requested an updated statement again today.