It is now almost 13 hours since my withdrawal. No transaction hash, no response from support ticket. They charged me $140 withdrawal fee for this garbage service???
Update: My COSS was successfully withdrawn after 36 hrs. HitBTC charged me 65 COSS ($143 at the time). I am very unsatisfied with their service but I am glad my tokens are safe. I don't plan to use their exchange again.
Good luck to everyone!!