SafeLite AutoGlass Charged me more then I was quoted on the phone. New Jersey

I was contacted by safelite after speaking with my insurance agent.  I was informed that my insurance would not cover the glass replacement.

I spoke with several differnet representative from both PA and NJ on several different occasion.  I informed them that my insurance won't cover any of the replacement cost and that I will be paying in full.

Each conversation (at least 3) I was quoted $160 out of pocket.  I was very clear that my insurance wouldn't cover it.  They still said $160.  So you can imagine my shock when they tried to charge me over $300 after the window was installed.

It is illegal for them to do this, but it was their word against mine.  I filed a complaint with their customer service and they said they didn't have any record stating the quote of $160.  I now record all my business conversations in NJ.

In the end, I was charged $269.  My receipt showed $250 including tax.  What did the other $19 go to.  Did the installer charge me for a tip???