Car maliciously scratched – what to do?

Hello guys, 2 weeks ago my Ibiza was badly scratched by someone unknown with a key or the like, and once across the entire passenger side. Front and rear fenders as well as both doors. Now I was in a paint shop (not to mention one – have very little time) and let me say what the fun would cost me with him: WITH ACCOUNTS: approx.1350,-€ WITHOUT ACCOUNTS: 700,-€ He thought it was so expensive because he completely sanded the parts off and new l (I am insured with the HUK with the “KASKO-SELECT option”, i.e. they would determine the workshop.) The car is fully insured, the SB is 300,- … in addition I would be back again from 85% to 100%. Now my real question: Do you know what is “usual” for the painting of the 4 parts? Do you think the offer of the paint shop is good? BTW: I hope I am in the right area for car care? with my thread 🙂 Greetings from Hamburg