Why can't I log in to the correct account on mobile?
If you're unexpectedly logged into a brand new account on mobile it's possible you accidentally created an account through Google, Game Center, Apple or Facebook and you are still logged in. To resolve this issue, please add a login email to the third party account.
Add a login email
Here's how to add a login email to an account created via a third party.
The login email must be one that isn't already used to log in to an existing RuneScape account, so create a new one or try these creative tips.
Please completely sign out of the third party account then log in to the correct account.
Make sure you're logging into the correct version of the game.