The shop has a take resemble care of your vehicle. They gave you an estimate for repair. This means they work on the vehicle and charge for the check out. The vehicle was handed back to you in a different state than when you took in in! Tag there it. Who's to say they did over heat it during check out. Contact who ever controls repair shops in your state, Here in CA it is called the BAR Most shops do not want them knocking on there door. (You are guilty until proven inocent) Shops will repair the car for free before someone like them show up!

 

You will need to charm them to get the shop to re fix the problem.

Anger - will not work.
Threats will not either.

Be charming and - you may get this fixed at a little or no cost
as they will want to retain you as a customer.
You are after all a periodic income stream for them.

 

A box of chocolate covered donuts is always a great thank-you gift and the best business bribe - they eat all the evidence. Most mechanics can't talk with a mouth full of donuts, so you'll have their attention.