If you put money into your self-serve account and the sim still says unregistered, you'll probably have to get the Moderator Team to help you by writing them a private message, here's a link if you don't already know how:
Contact the Public Mobile Moderator Team via Private Message, you can learn more on how to do that by clicking this link:
https://productioncommunity.publicmobile.ca/t5/Knowledge-Base/The-Public-Mobile-Moderator-Team/ta-p/...
They'll take up to a few days to write you back, but when they do they'll fix everything for you, in meantime while you're waiting you can try to reset your account yourself by reporting your phone lost via your self-serve account - then after you've reported it lost you can report it found again via your self-serve account again, and sometimes that can help fix glitches like yours.
