Definitely contact a moderator. I've heard of this issue before. My friend took her SIM card out and put it back in and it worked again. But that may not work for you. Give it a try and if it doesn't work, contact support.
Seems as most of them are only for new members. But there may be some for existing members! Just keep your eye on the announcements page. I'm sure some deals will arise from there!
It seems someone has hacked your messaging app or spoofed it. If the message doesn't show up on your side that seems to be the only reasonable explanation
