Cell C - Not customer friendly at all

We upgraded last year via telephone and since then (and we have been customers of Cell C for the past 6 years) we have had endless problems with our accounts. They don't follow up on issues even though they say they will call back within 2 days - well we are still waiting and it is now 3 months. We have credit due to us but we can't get our account creditted as the sim cards have been changed to prepaid and we have never used the sims cards. Oh I can go on and on but we have made the easy decision now that once our contracts come to an end with Cell C which is end of next year we will be cancelling all 3 and will not feel and regret doing so.