ERROR CODE 1:86001S:89001S:9C:-13561655840

They need to escalate this and get it corrected. Having to create a new account is an unacceptable solution. 

How did you get a hold of customer support chat?  I can't get them to respond to an email.  

3 weeks and its still happening to players like myself, has anyone had theirs fixed yet?

I don't think this is the same issue? Error code is diffrent.

We've bitten the bullet and got EA support live chat to unlink my sons anonymous.ea.com EA account from his Xbox Gametag. We then created a proper EA account and linked this back to his Xbox Gametag.

Yes, he goes back to level 1, but before this I was having trouble linking the child EA (anonymous.ea.com) account to Steam anyway as he's getting a ROG Ally Xbox for Christmas so will be moving to the PC version of the game then. So taking the hit now allows him to build his levels back up on the Xbox before Christmas, than carry that progress forward on the ROG handheld. This made it an easier decision for us to unlink the broken EA account now really.

Hola, me puedes facilitar el enlace con EA para solicitar desvincular la cuenta de mi hijo? gracias !!!

Nope still nothing. This lack of support to get this corrected is crazy.