Banned without reason and appeal failed

I was doing some SBCs on web app and banned suddenly without any reason in Jul 29: 

I had not bought coins online, or done any cheating behavior at all, I was also trying to pre order FC26 before this.

And even the appeal failed with the "Case not created" error :

I started a thread from here 3 days ago without response:

Banned without reason and appeal failed | EA Forums - 12399772

The season is almost over, hope it can be done ASAP, thanks.