Board Thread:Question and Answer/@comment-130.105.192.196-20161014072524/@comment-25151790-20161014084535

Your data should still be connected to your SNS account. Have you tried transferring your account again? (See the Account Transfer guide, if you get stuck.)

Updating or reinstalling Bluestacks can potentially unlink your account from your device. However, you should be able to transfer your account again to regain access to it.

With Bluestacks, it is possible to accidentally overlap with another person's device. If you cannot transfer your account, it is possible that someone overwrote it. In this case, you will need to contact support in-game through: Menu > Support > Support > (scroll to the bottom) Inquiry Form, select "Game Data Transfer", and send a ticket.