Update: I took my car to the Toyota dealership. They fixed the issue for less than $200. They said it was the belt making the high-pitched squeaking noise, but that Wrench-N-Time had put a used belt in my car, which is why the noise wasn't solved. I am SO glad I didn't give Wrench-N-Time more money to mess up my car further. A huge thanks to the Toyota dealership, I'm going back there for all my repairs from now on.