Hi-Tek panelbeater is the worse

This guys deceived and robed me day light. I took in my car for repairs at their panelbeater firstly they took to long but they will give you assurance of working on your car for only 15 days. The worse part is when they took my car to vw because the were somethings they couldn't get right and they were advised to change my rear wheel bearing they were quoted on and they told me they are waiting for approval from the insurance which they never requested an authorization instead the we to the rear excell which was affected by the accident and took out the old bearings which was affected by the accident and but the back to the new excell. Now when i drive my car has this weird sound it never had before