I absolutely regret my upgrades with Cell C - TERRIBLE service!

I have two contracts with Cell C - contracts I took out 4 years ago and things were going well until I recently upgraded. I do not know what happened but it seems like Cell C has been having fun charging me for things that don't make sense. I called last month to cancel a service I never even asked for - I was told that the request to cancel would be processed and that I would not be paying for this service in this month after serving the 30 day notice - but guess what?! It was never cancelled!!!!! Added to that, I'm paying pro rata that I paid for last month - why must I pay for something I have already paid for last month? I do not understand. For two months, consistently, I'm paying more than I should be paying; it cannot be a mistake. When I called - all I got (no sympathy or feeling that I've been inconvenienced and negatively affected by this) was that the case would be escalated to the Billing department. I REGRET THE DECISION TO UPGRADE MY CONTRACTS WITH CELL C! When I get a chance or am able to cancel the contract earlier - I will do so; no more contracts with Cell C for me after these two.