There is no way to get i back. In blizzard eyes you committed the ultimate sin.
Selling gold to Chinese is worse than botting/hacking/exploiting combined. You done goofed.... there is a reason why people don't trade even on their farmers with Chinese, not to mention main accounts.
Let it go... Let it gooo.. and get a new account. This one won't bother you anymore.
I might try goat sacrifices and howling at full moon with one foot in a bucket of squid eyes, but there is not telling if it will work. Still nothing like those thingy squid eyes.