While I share your frustration and anger... same thing happened to me yesterday and missed out on 100% rise in price.... it eventually got there. Took almost a full day but it got there. Problem seems to be combination of slow BTC networ and COSS but definitely most faults are on COSS exchange. It shouldn't take this long. Granted they're on beta version now, I really hope they fix this issue soon. This coin has 20-30x potential based on market cap alone if they can make it work. But it is big IF.
Thanks for your reply, hopefully they resolve my issue or return my funds. Saying that, they could have easily announced it on their site that they are having BTC deposit issues, if they were legit, like they did with Waves for example so their customers wouldn't have to go through such experience. But, obviously they benefit from such a scenario hence why they also don't reply to tickets for like over a week. It's a simple transaction for Christ's sake, that majority of descent exchanges seem to handle without any problem.