Contact Yobit through the forum by sending him a PM -> https://bitcointalk.org/index.php?action=profile;u=406594
Or send Yobit a PM through Twitter -> https://twitter.com/YobitExchange

It seems that the support staff isn't at all capable of providing solutions, which might explain why it takes insanely long for problems to be solved. That gives me the impression that there is only one entity being able to solve problems, and that's the operator himself. All other staff members can only provide people with support in form of advice - they don't have any authorative positions there. It's an experimental exchange that has grown far too big throughout the years, and that definitely shows - there is no intention to hire professional staff.