Coppa update account not working

when i try to go to realms i am treated with the coppa screen and when i press update account and log in it says that changes have been succesful and that i should be able to play but when i relaunch minecraft and open realms it still says the same thing and i am almost 16 and can't change my age when i press change information i go to account.mojang and when i try changing it their i go back to minecraft.net it's a endless loop