Acount linking and crashing

Hello EA Support,

I am playing FC Mobile on a Guest account and I recently submitted a ticket to get my account linked to Google Play / EA Account.

Since then, I am no longer able to log in — I keep getting this error message:

UNKNOWN ERROR [10000]
UserId = 965266685352849410

Please help me:

1. Restore access to my account.

2. Link my Guest account to my EA / Google Play account so I don’t lose progress when FC Mobile 26 arrives.

3. My game is also getting crashed 

Details:

UID: 965266685352849410

Device: [Oneplus 8t]

Platform: [Android]

I have worked very hard on this account and don’t want to lose my progress. Please resolve this issue and confirm the linking.

Thank you.