Doesn't it appear on
https://yobit.net/en/orders/ ? If yes, there's an x at the end of the order.
Additionally, next to the "Sell" box you can find the history and above your placed orders. Just click x
Thanks, that was helpful.
My account states:
No open orders
But also says that I have 1000 AV locked in orders? Do you know how this may be?