Workshop connection in the insurance company. Can’t you go to another workshop now?

Hello people, need your help. My wife has had a small accident with our car. Luckily only small damage (cost approx. 2500 € compared to and approx. same price with our). Our car is fully covered with 300 € SB and workshop connection. Can I now go to another car body workshop and have the damage repaired myself or I have to go to the workshop where my insurance will send me. This morning the damage reported to the insurance company and This afternoon a workshop has already contacted me with the please bez. the damage taking by. This means in the short time: report or cost estimate had made, money collected and the damage at the body workshop done around the corner or the bumper and fenders can be painted and installed themselves. Because otherwise is still fine at the car. Thanks for your answers already in advance. Greeting lordnrw