About 9 hours ago I sent BTC to Cryptopia exhange using open BTC on the Bitshares platform but it hasn't shown up yet. I opened a support ticket but I haven't received a response from support yet. Does anyone know if there is a way to cancel my withdrawal transaction or am I screwed? The ticket I opened has been open for 9 hours with no response and I have no idea where my money is (somewhere in the cloud I guess). If it was a smaller amount I wouldn't be worried but it was for a larger amount. What should I do?