throws to lvl 10 although I'm on 3 (Fortnite)

we played one game in the 3rd division, and after this game we got into the 10th division. We went to play in the arena with a friend, in the 3rd division, but instead of the 3rd division we got into the 10th division, we tried to restart the game, but nothing has changed, please correct the mistake, while giving -80 pts fare.