Hail damage to the car

Hello, my car has suffered hail damage. I have already reported the damage to the insurance company. There I was informed that a collection point will be set up for the evaluation of the cars. Nevertheless, I was at my workshop today and wanted to have my car inspected there. This gave me the information that they can not have any estimate made for hail damage. The workshop then contacted the insurance company and asked d about that I should have my car inspected by those, because according to the owner also an expert does not always know how high the damage is. Now I wonder if I am then obliged to have my damage done at this workshop, or if I still have the choice to go to another. Besides, I also consider paying off with the damage. Can you tell me a few infos about how such a damage regulation because Yours sincerely, Janarinoa