an update on my part:
after about 24 hours I mailed again to kent.yan@tradove.com, merry.meng@tradove.net and bbcoin@tradovemail.com, yesterday. after a few hours I got a mail from merry meng that it is not possible to return the payment at the moment.
surprisingly I got the refund today and I am glad to be out. I do not care whether tradove will be a big thing in the next years or not. they are unorganised and I missed the interaction with and the proximity to us, the investors. without that, I cannot trust such a company.
I will consider this as an experience.
and because I was curious, I have just mailed to some of their corporating companies whether they really are active in this network and I am looking forward to their replies.

Best wishes