collision shop scamming my insurance?

christmas night, driving home from family’s place. the biggest raccoon you’ve ever seen runs out on the highway and we collide. i lost a chunk of my fender and that raccoon went to valhalla.

i bring my car to a collision center and they hold it for a month doing their thing. date gets pushed back multiple times, sure okay. they quote $4500 for fixing sensors and repairs, i pay $1000 out of pocket and my insurance does the rest.

i pick up my car and it is not fixed, still has screws falling out and visibly isn’t fixed. they take it back again and “get it right this time.” but not really.

i go to my mechanic and he shows me the cracked clips, missing screws, all of it is shit work. so now im pissed, my insurance ticket is closed, but my car isn’t back to pre-collision standards. did they just rip off my insurance? can i re-open the ticket and take my car somewhere else or am i screwed?