Terrible customer service

PLEASE Help. I don't know what to do the service at Telkom is non existent. I relocated to and area where there is no Telkom coverage and Wifi Modern didn't work. I logged a call ref ***7 in November 2019. I then received a call from Simone Samantha Delo explaining that she can't cancel my service till I had in the device. I then went to Clearwater mall Telkom and handed the device in. Than made contact with Simone Samantha Delo again on email she than told me to go back to Clearwater because the didn't log it on the system that they have received the device. I then went back to Clearwater made sure it was logged spoke to the manager of the branch. She assured me that someone will phone me told me it will be sorted out. I never received a call. I went back to the branch a few weeks later. Request to speak to the manager and this time it was a different manager is than also assured me that someone will phone me. I did receive a call I than explain the problem to the person that was in February 2020. The person than told, me he would need to investigate and come back to me. Till today he has not come back to me. I am being bill for something I don't!!!!! I have cancelled my debit order. Ref ***7 Ref *** reg ***7 ref ***1 the above is references number I wrote down and I probably logged 10.