Worst network ever

Since I moved to Limpopo last year September I struggle with my network. I missed a lot of important calls, my work thought I do not do my work, because my cellphone is of the whole time. I visit a Cellc branch and they informed me the issue is with my phone. I then upgrade my contract (been with them for more than 12 years). To my surprise I still sit with the same issue. I phone their call centre and the consultant informed me that I will not have signal in rural areas and free ways, way on earth don't you tell your customers when they apply for contract. So I stopped all payments on account and March 2017 they suspend my line. I phoned them again because every month they keep on billing me for a simcard I am not using, everytime promises from their side. I mailed them and informed them that I want to cancel my contract, which they then said they will investigate my problem and give me feedback. Still they keep on billing me. Well today I received a letter from them, whereby they demand payment within 7 days. I phoned the call centre again and told them I still wait for feedback on my network issue, so she informed me the system showed case closed and she could not give me the outcome. She said I must phone another 084 number because that is the department that demand the payment.

CELLC your service suck. I will not make any payments on the account until my problem is solved. And certainly I wont pay any amount that was billed after March 2017, the time that MY LINE WAS SUSPENDED AND I DID NOT USE THAT NUMBER ANYMORE.