Wrong Sub Account on character screen

When I signed up to pathofexile.com online I mistakenly created 2 accounts (sub accounts?). One account currently contains 2 of my POE2 characters (PS5) and the other account contains none.

I mistakenly changed my main account to the other on the character selection screen via the drop down box in the top left and now I don’t know how to switch it back. Everytime I login now it takes me to the create a character gallows screen with no option to switch back to my main linked account. Any advice? Cheers.