Incorrect amounts debited

It is unfortunate that I have to always type a review on hello peter in order to get a response from MFC. I cancelled a service plan which I was forced to take up and told that it's compulsory. The complaint and cancellation department ''assisted me'' in cancelling this. I was debited more than I should have been. When I try to get assistance, everyone tells me that the service plan has been cancelled. However my debit order shows differently.