Replacing brake pads for the first time: what to watch for

If it is under warranty, go back to the shop first.

Do not overtighten carbon parts. A torque wrench is worth it.

I would replace rather than repair at that price.

Clean it properly first, half of these problems are just dirt.

There is a good guide on this in the Articles section.

Sounds like the bearings. They are cheap and easy to swap.