Cancel the association with Steam

I am a Chinese player, and I needed to use an accelerator to successfully register an EA account. Due to the game requiring secure boot, I specifically went to a store to reinstall the system and fix the secure boot. As a result, my EA account was banned. Did you just ban my new purchase before I even started playing? Are you human? How brazenly obvious is this money-grabbing? Who even dares play your game? Spending money just to suffer!! Now I need this account unbanned from Steam to request a refund!!!!

The EA account is as follows：
EA:[edit: email address removed]   EAID:Exp12308
password：Expexp439#
Unbind!! Unbind!!steam