Hi there,
Thanks for sharing the screenshot, and I’m sorry you’re still having trouble linking your FC Mobile profile.
The “EA Account linking failed” message is quite general, so could you confirm whether this FC Mobile profile has ever been linked to another EA Account? Also, did support explain why they recommended using a different account? Please note that we’re unable to review accounts or make changes to account links through the forums. All we can do here is try to point you in the right direction. Since this issue may require an account-specific review, you’ll need to contact EA Help again if you continue having trouble, as an advisor can check the account and provide further guidance.
Please don’t share any personal account information publicly. You can also find more information about linking and saving your progress here: https://help.ea.com/en/articles/ea-sports-fc/fc-mobile/save-your-progress/