Poor service and accountability

I recently moved homes and with that asked to transfer from the old home to the new home the security service. Had to sign up on a new contract which seemed ok, however have had continuous problems which communication. What's really frustrating is being debited for amounts I didn't agree to and when I engage the accounts team I'm given different answers. This has been ongoing since the beginning of June with commitment that i will be refunded but nothing to date. As at August have been debited another amount that is not in agreement nor has an account or invoice been sent. Next step is to raise the matter with PSiRA.