Cancellation of studies resulted on overdue accoun

Good day, <br> <br> My husband sent an email cancellation of our son's studies at Impak last year, July 2014. Unfortunately Impak continued to bill us from August - December due to the fact that we did not submit cancellation on a form format. I have raised this complaint to their accounts on numerous occasions my account was being credited even after I explained that the child is no longer at the institution. <br> <br> My account is now sitting at R 3 328.00 and I don't understand why this matter still remains unresolved even after I stated that the child is no longer studying at their institution. <br> <br> Are we now being penalised for not sending the form? I need to understand why is the email still not accepted even after advising on the cancellation they still continued to bill us month after month. <br> <br>