My Brawl Stars Username Changed Automatically

I noticed that my Brawl Stars username was unexpectedly changed, and I'm completely clueless as to why this happened. It unexpectedly transformed into "(Warrior)." I'm unable to do this since I lack the necessary gems to modify my name, and now I'm unable to revert it back. I kindly request that my username be reverted to its original state, or alternatively, I would greatly appreciate receiving 90 gems to cover the cost of changing it back. Kindly address this matter promptly.