You really shouldn't have bothered vs. You really wouldn't have bothered

[Francis]

Hi,

[i]A dinner party

• We’ve brought you some flowers and a bottle of wine.
• How kind of you. You really shouldn’t have bothered.

Is it correct to say “You really wouldn’t have bothered.”?

Cheers

[Beeesneees]

Not in that context. ‘Wouldn’t’ can’t be used because they have already bothered, so the action was in the past.