Hey there!
I would give the team a few days, as the site was just released and they still have to worry about releasing some updates and getting everything settled with this update. I am sure they're working hard on getting the tags out to the site users.
For now, I would just send in a support ticket at
https://havocmc.net/support and wait for them to handle your issue.
Note They are probably receiving hundreds of tickets already in regards to this same issue. Just give them some time and you will have your tag in no time