Bike Brake Pad Repair

I've got a bike with a damaged disc brake pad. I think the brake pad got damaged/squished together when in storage. I'm in need of a skilled bike mechanic to assess the damage and repair or replace the brake pad. Also need additional help putting a part back on the derailleur a per the picture. Hoping once this is fixed I can get my back tire on


Ideal skills for this job include:
- Proficiency in bike maintenance
- Experience with disc brake systems
- Ability to handle bike repairs post-accident