The XVG wallet is working fine on Yobit. I had the same issue a week ago where my altcoin wallet was under maintenance and the coins took 3 days to appear in my wallet. Don't get what's the issue with XVG then. Did you try contacting this user: purl=https://bitcointalk.org/index.php?action=profile;u=406594]Yobit[/url]?
I don't think people should flip out over their balance not updating immediately sometimes technical issues happen its understandable but two weeks is kind of ridiculous, they need some sort of wallet export function so I can it handle myself and get my money back, I have a decent chunk of change in xvg on yobit and I want it back now.