Incorrectly billed and unauthorized debit order

I am being sent from MTN to Autopage and from Autopage to MTN to try and sort out why I have been billed twice by Autopage and one(incorrect amount on top of it all) by MTN<br> Don't know why Autopage had to transfer my account to MTN. They also loaded a debit order on my bank account without my permission. No one at customer care will help me