? for the OG garage/truck

the water pump went out on my truck. the garage broke two bolts off when removing the water pump. one bolt they got out no problem. the other they worked on for hours and cant get out. I hope they get it out today. Im afraid that they are going to charge me a ton of money for this. How much am I responsible for? just the original 200$ they said it would cost? or am I going to have to pay a bunch extra?