You can use this email to contact the devs for help or send the signed message, i heard they answer in a day or two.
i can confirm that ethereum refund has been smoothly received from the first batch.
I've already done that and they answered me, but it's been a weeks since their last answer. Maybe they're too busy which is fine, but I'm worried maybe they missed my email or went to their spam or anything.
I'll send them a new email now with a "read" request! ^^
^ This has happened to me too, but I send from an exchange so I'm even more uncertain...
I'll send another email as well.