Telkom service. You cannot complain about service as there are none.

I have app**** for Telkom fibre 25 mbps speed download. The installation was quick and installed on the 1st of December 2021 but I requested to keep my 16 year old land line number. They gave me a different number, close to my old number. I have requested it to changed since then with no success. My 2.4 g has a speed of 0.15 to 25mbps, but drops fast. I am trying to cancel my subscription with no success as you can only do that via the app. I logged into telkom app, with no option for cancellation. I tried to call, but all they say is I have to use the app. I am totally frustrated with Telkom as no one can assist.