Had you ever heard about Yobit before you bought coins on there?
As a guide of practice, the first thing you do when you buy on Yobit is check if the wallet is in maintenance mode. Most people are aware of the slow response of cryptoexchange support teams, and many people who call themselves serious traders do not use Yobit for various reasons. So you better make sure that everything works at the time you buy a coin onthere. Another good practice is to get coins out of exchanges into your wallet as fast as you can.
Yobit has a bad reputation, however they do release wallets out of maintenance mode when they seem to be able to do it. This has happened with icash for instance, of which the old chain wallet was put back in service after two months, even if the coin was dead and useless already and was only needed for people who were too late for a swap and didn't pay attention to their investments.
I understand your emotional response but be patient and I'm pretty sure that one day the issue will be resolved and you will have to take back the "scam" accusations.
According to a slack member, a yobit moderator said in the trollbox that "the neutron wallet will be under maintenance till devs send updated node details..."