You will be fine. I had over 12K in 6 or so accounts and got it all back eventually. It took over 180 days , but I got it back. Try and relax and be greatful it was only that much money.
I have resellers for me in the past NOT selling VERO items and USING REAL accounts (not stealth) and dumb ass EB/PP still did this to them. And after they gave them all the docs and waited 10 days they either asked for more information OR just said the invoices/supplier can't be verified by them. Some times the invoices were not real and a few times they were real and in BOTH cases it did no good.
I truly believe once you get this notification it means they hate you and you are done with them, atleast with this account.