Simply reject the offer and move on to something more important for you bud, I guess you are possibly new to crypto, else, it is not hard to know that this is nothing but a scam, every active user in the crypto space must have at some point come across this exact scam tactic, it's dated from way back 2018/19 or so, or maybe even earlier.

With this strategy, the scammers simply feed through playing on their victims intelligence, I believe someone must have mentioned this here but just incase no have, have your wondered why they can't simply take their $1000 from the 12 bitcoin they sent you, why do they require you to deposit fresh money when there is already more than enough money on the account to cover every needed or required fee? They simply want to scam you.