OP, I've just added your case to this list:
[INFO] Updated Summary of malpractices and abuses of exchangesPlease keep us informed if there are any new developments. I hope you'll manage to recover your funds, even if it may be difficult as the situation you're currently experiencing is a full part of ChangeNOW's business model..
Another interesting detail: i opened financial claim on bestchange, and admin changed claimto non-financial, like those people dont own me anything) I think Bestchange same people too, but they seems to be present here without problems?
You should have a look on
https://antiswap.io if you want a quick review of how shady BestChange are..