First of all, for God's sake, why did you deposited such big amount of BTC to qoinpro, while there are many reputated exchanges you can use, or even simplier - claiming all these forks with your private keys? Qoinpro isn't a best place to do that, especially when they been disappeared for long time and come back only few months back.
I can't help you much with this issue. Only advice I can give you - try to post on their official bitcointalk thread:
https://bitcointalk.org/index.php?topic=451449.0Maybe bad publicity will help you to get your BTG. I see that user woutersteven from their staff replying there sometimes.