DEBIT ORDER NOT AMENDED

We have trying to get Sage Pastel to amend the debit order amount after cancelling the one add on module. It has been confirmed the add on module has been cancelled, but still the debit order has not been adjusted accordingly. We were over charged in March and April. After numerous correspondence with Sage Pastel no one can tell me if the debit order has been amended YET. The emails are just forwarded from one person to another. If the wrong amount gets deducted AGAIN I will be forced to reverse it. We have been OVER CHARGED FOR 2 MONTHS already.