6.4 won't start on iOS

[OneWorld]

That’s unfortunate that you haven’t linked your account yet. Not sure if support can help you, but that’s for them to let you know.

Other than their response times being slow, which is generally acknowledged, and @Kafka has gone into detail about (see below), I have had a positive experience with support. To be fair, not linking your account would not be considered a fault with their support, but let’s hope for the best.

Need Zendesk Help

Sorry for long post: I can talk about support for hours We have a few things pointed towards in the support requests/tickets: To submit a ticket you need to go to the Help Centre - so the hope is you’ll see a helpful article or look through the articles before writing to support. On the ticket forms itself when you’re filling out your information, it points to the known issues articles in the help centre for bugs and to the forum to ask questions from the community for fast help. …

EDIT: According to this, they should be able to help you recover your account after you reinstall:

Was getting error 13, uninstalled and reinstalled. Account appears to be gone, help =(

If you have noted down the password from the Setting (cogwheel) you can input that when you first launch the game or can do again in Settings. If you haven’t, send a support ticket and devs will ask you a number questions and then help to retrieve your account.