I had a setback in the sink and called the plumbin...

I had a setback in the sink and called the plumbing ward to get this fixed. They solved this okay, but used so strong solvents that the sink got bad etching damage. Upon contact they repeatedly said this should they look at, but they never contacted. Fortunately, the insurance company arranged everything.

Steer away! If they hurt something with you then you are dependent on good insurance.