For now? I think the best you can do is wait patiently. There's no ADR platform that could help intermediating your case --that we know of-- so your best chance is probably wait for their reply here on the forum. I have left a negative feedback on both of their official accounts for a neighboring case in hope to persuade them solving cases against them that started to form a pile, and bitcoingirl has also left a neutral tag, albeit for different purpose. I suggest you to wait until they're back online and see if they'll respond to your case