******** debiting of account

I returned the Neotel Device within the 7 days cancellation, due to the poor customer services received in setting up my device at home.<br> I have a termination letter dated 30/01/2015 (SREQ - ***), indicating that I no longer require Neotel services. 03/03/2015 I have an amount of R270 taken out of my account.<br> I called the customer services 03/03/2015 to understand why is my account being debited (spoke to Nuthando - Reference Number SREQ - ***) and all he can inform me is that, he will raise a query for the call and the investigate why the account was debited, once cleared that the money will be turned. Y does one's account have to be debited after a month of cancellation? Y do i have to continue to follow up on this? When will my money be returned?