Brake Debacle Continues

So I still don't have my truck back from Mr. Tire. They're saying some hydraulic valve is the issue but they aren't sure. So they requested I purchase the part and they'll install it for discounted labor, What? Uh how about you find out what's wrong before you ask me to purchase parts that you aren't sure are broken?

I called this morning and asked them to put my truck back together so I can come get it.