It would be a good thing for them to do but at the moment even my 500k coins just disappeared from investbox and history is clear. Yobit is so cool!!!

Your 500k coins are not lost! Perhaps they went to pay for a new plan. Someone must be a sponsor.

Could be several issues coming into play here. Just get in touch with them via a ticket and hope that they respond soon. I know they usually take their time, but maybe you got more luck and they'll get back to you quickly.