over debited

My vehicle account has been is in advance due to to the fact that there was more than one debit order for the same month. Now when I called MFC yesterday to reimburse the difference to my account I had to wait more than 30min without any help, but being transferred from one help-desk to the other. It's amazing to note that when your account is in arrears, it's so easy for the bank to link you directly to the collections department, when you are the one owing them. However if they are owing you, they give you runarounds .

Can you please reverse the debit order from my account???