If I got extremely burned by an in office whitening, what should I do?

I want to state that I am not a USA citizen. I went to a clinic to replace my 10 years old crowns in my 6 upfront teeth. I got mold on my temporary teeth to duplicate them but in my second visit I want to do some other final adjustment to their shap and length but my dentist rejected that and said he will make a list of my requests beside the previews mold and send them to the lab. I am really skeptical about the final shap since I had two previous bad experience.. what should I do now?