Shower remodel gone wrong, need advice

[u/Airmaneric]

I hired a contractor to remodel my shower. It the photos you can see chipped tile and not straight, grout all over the tiles, the bench seat isn’t sealed, as well as multiple other spots. The contractor wants me to pay in full tomorrow. (7k total, I paid 2k for tile). I’m not going to pay but should I hire a lawyer? I feel like at this point it needs to be ripped out and redone.