Never take out a contract with mrp mobile

I had a call offering me this tablet at R 99 a month which I accepted, Little beknown to me it uses WiFi and cell data at the same time . You actually have to turn off mobile data for it to stop anyways I ended paying a fortune for data usage. When the 2 yr contract was up I cancelled the contract . But they in their brilliant wisdom continued to bill me and are now having debt collectors phoning , sending smss and emails , in other words harassing me , I told them to take me to court but get ignored , so obviously it’s time to counter sue the *****s at both the supplier and their so called agents to stop their rot. Service non existent and absolute idiots on the phone