I don't think you have the right website from bibox exchange. is there any way you can share some screenshot for us so we could look into the website if actually correct or not. Secondly before creating any exchange account try to open it from CMC if they are being listed over there then it would be more better for you to get in contact with the right site instead of getting yourself involved with the wrong site.
I will advise you to contact them through their live chat or join their telegram group for complaint.
Be very sure it is the right website before your accusation.