On SSH, you should be able to type in uinfo
to see information about yourself and groups
to also see a bit of information. Both should let you know if you paid for an upgrade or not because they would mention something about ARPA.
When paying for an upgraded account, they needed to know your SSH username in order to give that account increased permissions. If that was not done then they likely need to know information from you so that they can associate the payment with the correct account.
It has been mentioned at the link below that there is an email address where you can reach out and mention membership issues. It may take a bit of time for a reply though.