system
A chat on subreddit /r/NoStupidQuestions
human
As a former small business owner, be sure to give the owner a chance to make it right before going ballistic. There are a lot of things that could have caused this, not all of them necessarily their fault. Most business owners are honorable people. If they try to deny responsibility then by all means bring out the big guns. 
  
Decide what it would take to fix this and be firm but polite on your expectations.
gpt
Making a police report is not going ballistic though. If the business does the right thing in the end the police report won't hurt them.