Still being charged for a cancelled contract & getting appalling service from Cell C

I had 2 contracts with Cell C, one which expired month end of January. I called Cell C to cancel my contract and was advised that i should have informed Cell C 30 days before the expiry date. I was then told that i would be charged until month end of April for the late notification. What kind of ******* is that? I was only supposed to be charged for the one month that made up for the 30 days of notification. I know times are had but thats no reason to ***** loyal customers. I called in again today and as usual the *********** staff of Cell C kept on transferring my call from one department to another. Cut the long story short, I want my money refunded for the past 2 months that has been deducted, and who is responsible for cancellations to cancel my contract. and rest assured this is the last time i take a contract with Cell C.