Get in contact with support, make sure to go into the live chat. They'll just need a picture copy of your email (Upload it to imgur or something like that) to confirm.
To those having issues, try contacting UbiSupport..took me 3 minutes and they gave me my code....I was having the same issue after confirming my participation.
Now just waiting for the 43.31GB DL to finish , tfg for Fiber...lol good luck and have fun