Still waiting a week has passed

<p>A week as passed and still no one had come back to me regarding me being wrongly billed. So far... for the last 3 month my debit order has been different amounts. I've call the call centre. They told me to go to the branch. I have been there twice. They promised to get back to me. I've tried calling to follow up. But they don't answer the phones. This is very frustrating now.</p>