Your insurance company is not going to certify the repair, except in the very unlikely chance that your insurance policy provides for such certification. Their duties are outlined in your insurance policy, and they are unlikely to do anything beyond what is described in that policy. If the repair shop doesn't do the work properly, you may be able to make a claim against them for the cost of completing the repair - but if they were never hired to repair the additional dents you have identified, you have no claim against the body shop in regard to those dents. You will have to work that out with the insurance company.

(Did your vehicle roll?)