POOR SERVICE - RIPPING CUSTOMERS OFF

On the 6th of August I cancelled my data bundle that i took additional to my contract. At the time i was told that the use of the data will stop with immediate effect (even though i was billed for a full month). On the 1st of September i noted on my statement that i was again billed for data. When i phoned in i had the worst service ever - from the consultant and the supervisor. 1stly i do not understand how i got billed again in September. To my knowledge you pay data in advance and calls in arrears. If Cell-C doesn't work like this, surely i should be charged pro-rata? In fact, if you go into my account you will see that i hardly EVER even used the data that was part of the contract. I haven't used the data bundle in (if not ever) at least the last 4-5 months. Then the two of them added - it was my choice to cancel! It was most definitely not my choice to be ********** and having to pay for something i haven't used or had the use of.