Incorrectly billed

I downgraded my package at the beginning of August from premium to compact,yet I was debited for the premium package even though all the premium channels were blocked - I now see that from 1st September, my premium channels have been re- instated without my consent and I have a bill for the premium package for September. I want my account credited for the difference and my package downgraded. I lodged a complaint 9 days ago and I'm still waiting for someone to sort it out. Poor pathetic service!