UPDATE : thanks to the amazing support he got his account back!!
so my father updated the game but he couldn't load into any level, so he thinks, i'll reinstall. and so he does, but after this latest update the 'start' and 'login' button have dissapeared from the home menu. no problem, he thinks, he plays through the intro, and once he's into the game, he clicks the icon on the upper left, and logs into facebook to get is account back. guess what? it linked the FRESH account to the facebook. shouldn't it have said : 'there is already a account linked to this profile' or something?? please help him get it back, he loves the game, his account was calles 'wakki-6295'