Cell C's service stinks

Long story: Had a call in August last year from a Cell C Direct motor mouth who convinced me to renew my (expired) contract and get a new phone. My old Nokia was starting to give trouble so I agreed. That was my first mistake. Within two months the new Nokia was giving trouble. I contacted Cell C and they said they'd send a courier. That was October 2014. I'm still waiting. Then, my second mistake, I agreed to a new phone and different contract in December. Well anything to get rid of the other, faulty Nokia. Should have held out I guess. That cost me money to have my Sim card changed as the new phone came with a micro Sim card. (I know nothing about these things - just wanted the darned thing to work!) Now I have a mystery charge from Cell C. I've emailed 3 queries and they promptly tried to phone me - my phone was off and I had an SMS to say they'd tried me at a number that may once have been mine around the time of the Groot Trek. I emailed another query telling them to reply by email. I never want to speak to anybody from Cell C on the phone again. They are awful. When this contract expires I will definitely take my business elsewhere.