line play.
there's no support. you can report people, but that's about it. line (messenger) has a web contact form, but it doesn't include line play (game) for the support. so you won't get the answer you want.
you can clearly see the massive amount of complaints and issues through their official facebook comments, app store reviews. they have no official forum, but they had a tumblr from 2012 that is left outdated/unused.
i know why they have no support though. but i'll stop it here.