Cell C *****

My husband had a contract with Cell C. We moved to the UK more than 14 months ago and he paid the account in full last year December. He has emails stating that the account must be closed and that all outstanding monies have been paid. Cell C however decided after 8 months to start deducting money again! This account should have been closed more than 10 months ago. This is ***** and after speaking to a senior officer at Cell C via email informing him that this is wrong they still kept at it.