Board Thread:Questions and Answers/@comment-35042694-20180705003612/@comment-34799065-20180705010258

https://www.reddit.com/r/DBZDokkanBattle/comments/4lua93/account_recovery_guide/

Here's a good way to get your account back, but you should try this after your game starts working. Though I don't know how this works, but check to see if you are signed in on Google Play. Some people say that works.