Great, fun, addicting. But....I cant play anymore

So I got a screen that says network failure and it wont got away, and I have tried everything to fix it. Really upset because it was fun, and would still play even if it meant having to restart but cant even do that. If you get the game be careful as it may bug and not let you play at all.

1: about Ninjia Legend：Heros of Hayate