ok cool but how to find moderators here? I think they are too busy in forum work and may be they can not pay attention to everyone's request as they have many. I think they should issue one warning to the account holders before given negative trust as this can wasted their long hard work. If they found any complaint from bounty managers regarding bad working or scam then they should ban them.
Usually I just write in private messages to the moderator of one topic or another, in which I wrote. In 90% of cases I was answered, so I think this is one of the most practical ways.