Cell C - Worst Service provider.

I cancelled my Cell C contract on the 26 October. My contract had expired and was on a month to month. I first tried to cancel instore but was told to go call the cancellation line 084 143. According to the lady on the line it was cancelled, Since then I am still being billedevery month. My account that being billed is inactive and incurring ridiculous returned debit charges. I have emailedCell C numerous times with no response received! I am out f the country and I cannot call them. What a sickening company to deal with? I shall take this further to the ombudsman. Disgusted!!!