Given they have told you that you were not welcome it's got be questionable whether the club should still be holding your personal data on mailing lists. It's difficult to see how they could persuade the ICO they have a legitimate reason to e-mail someone trying to flog hospitality when they have been asked to stay away.
If club are reading this, you may want to check what the GDPR regulations state to avoid a potentially self inflicted wound.
Memories of the club leaving all the season ticket holders private data online a few years back...