I may have been scammed of $3000. by someone called “compounddefi “, is there any way to retrieve my money?

Scammers frequently impersonate well-known projects, including Compound, to steal crypto.

“compounddefi” is one such scam, using a variety of domains and Telegram groups. Unfortunately, there is little you can do besides report them to law enforcement, and help others learn from and avoid similar scams. I’m sorry for your loss.