My account was broken into and a lvl 1 account is selling my items, what can i do ?

as per title, this is a private account with a lvl 1 character selling my items. I had to buy what i lost again and sure enough my old items was sold by this account.
I have sent an email to GGG but apparently people are saying they cannot get a respond from them using the old support email
I have changed my email and password, but i'm not sure what more i can do