Are you still having trouble with the brakes? If they are still metal to metal, that really isn't safe and will progressively get worse.
Replacing the caliper and the brakes pads and rotors are something you could do yourself for around $200.00. Take a look through these links and let me know if you feel comfortable doing it.
https://www.2carpros.com/articles/how-to-replace-rear-brake-pads-and-rotors
https://www.2carpros.com/articles/brake-caliper-replacement
It really isn't too difficult to do. I can help you through the procedure. I have videos showing the rear pad and rotor replacement also.
Let me know. Call around a few part stores and get prices for the one caliper and the pads and rotors. I know places like AutoZone sell pads and rotors as a package.
If I can help, let me know.
Joe
Nov 14, 2021 at 6:50 PM