The Pattern should have

The pattern should have + past participle is used

to show that something was advisable, but it was not carried out.
e.g. I should have studied last night. (I didn't study last nigt)
He should have done his chores (He didn't to his chores)

The negative form: should not have + past participle indicates that an action was carried out, resulting in an outcome that is not desired.
e.g. I should not have eaten shrimps. (Now I have rash).
He should not have driven so fast. (He had an accident).