Bad Service from Cell C

I have 2 contracts that were due for upgrade this year. I negotiated a contract with the retensions department (as the current packages they had were not to my liking), only to find that the contracts they put us on were not the ones we'd agreed on. I have phoned them on at least 5 occasions to get this sorted out. I was informed each time that they would have to listen to the recordings and get back to me - so far no-one has bothered to! To add insult to injury, when the debit order went off this month, it was over R120 more than what was agreed upon. When trying to phone them again, I had to hold on for more than 10 minutes. When I finally got through to them and started explaining from scratch, the call dropped from their side....