Telkom Contract

I needed a new ISP, for wireless LTE. I contacted Telkom and was assured by the saleman that I had LTE-A coverage with a minimum guaranteed line speed of 10mbps. I asked him many times if he was sure I had good coverage and was assured I did. I further asked whether the Telkom contracts have the 7 day cooling period should I not be satisfied with the service. The Salesman confirmed I could cancel should the service not be as promised. When I received the router and sim I found that the line speed was so slow, The speedtest I ran said that I could only connect 1 device at a time and browsing will be slow. I contacted Telkom to explain my problem and only after contacting Telkom 3 times to exercise my right to cancel the contract. (interaction number ***) The third time I contacted an agent who had advised me that the previous 2 agents did nothing with my case. Received an email from a Telkom agent confirming that I was within my right to cancel. The router and sim was collected. 3 months on I am still being billed for a service that I do not have. I have contacted ICASA (GAU2141/19 ICASA:***) and they advised that Telkom had 14 days to respond. It has been more than a month now with no joy. I really hope Telkom reads this.