Brakes

I recently took my 97 Ford Ranger to a mechanic shop because I need new tires and my brakes were squeeling. They did the repairs and I was off.

The next day I had to take the truck back because everytime I would apply the brakes, I heard a grinding sound. They told me that a part that they had applied had failed and they would replace it.

I got the truck back yesterday. I think I still heard a grinding noise. Someone at work told me that when you get new brakes, the vechicles take some time to get used to the new parts. Given what happened above, should I take my truck back again or give it a few days?