Sick of Telkom

I am having serious problems with my Telkom cellphone. It drops 80% of all calls, and I have to constantly phone people back and they tell me my number was unavailable. It happens everywhere and every single day for the past two months. It happens when I am in Pretoria West, Pretoria CBD, Sandton, Randburg, Johannesburg CBD and everywhere in Gauteng. Also, the data network is particularly weak, everywhere. No apology or feedback after reporting this. I am sick of Telkom!!!