Impaq - Terrible finance department

I have both my son and daughter enrolled with Impaq. I've recently changed my banking details and it seems impossible for Impaq to succeed in recording my correct banking details on their system for debit order purposes. After numerous e-mails with no reply from Impaq in an effort to rectify the problem I still receive notifications that they will charge me R100 penalty for each debit order that does not go through. I tried to get them to remove my banking details from their system so that I can continue with a manual payment option but get no joy at all. It is very unprofessional from an educational institute to simply ignore problems and decided to rather look the other way. For anyone who is looking for a self study option do not think twice in giving these guys a skip......