Unfortunately, Bestchange's reputation has changed drastically, and they are no longer trustworthy. There were promises to revise their review system, but it remains highly biased. They are active in the local section, so try posting there or ask for help from one of the active members in the Russian section.
Quite disappointing after a couple of years of very good presence here.
As an aggregator, it is not enough to just have a listed exchange and collect affiliate profit, there is also a serious responsibility to protect against irresponsible services.
In the EN part of the forum, they were very often criticized for that, unfortunately they chose a rather bad way to prevent it, which is to ignore the discussion here.
Even in their redesigned version, I don't see a significant improvement in the feedback system, except for a slightly better UX