There are limitations on any fines and penalties that may be recovered. For additional information on the investigation and hearing process, please see our What to Expect if You File a Complaint Against a DMV Regulated Business
And what do you recommend to avoid having to deal with an unreliable workshop?
Good Smart Shopping for Auto Repairs Can Help You Avoid Trouble With A Dirty Or Dishonest Repair Shop
and can i inspect my vehicle before paying?