Originally Posted by JARblue

Make the shop pay for a tow. Most insurances will do it free - get the shop to reimburse you and pocket the money.

Or you could check the coolant level and possibly limp the car back to the shop. I would be hesitant to do this though unless the shop is nearby.

Or you could prevent an obviously incompetent shop from doing further damage by locating the leak and fixing it yourself.