Bug Rey Legend

Hello, I've had this bug for over a year now that's stopping me from progressing in the game. This is precisely Rey's last level to unlock his ultimate. I don't have access to his ultimate which means I can't finish the last level to unlock his ultimate. Without being able to use the ultimate in the level it is impossible to finish it I need help, I contact support very regularly and no one can help me fix this bug, please I need a solution