Dear all,
Since the these trading pairs price is less than 0.00000001ETH, they will be delisted on Apr 30, 08:00 AM
PBK/ETH, GFN/ETH, DIGS/ETH 
Since there is no trading volume more than one week, SHMN/ETH will be delisted too on Apr 30, 08:00 AM
after that you can still cancel your order in these pairs
How to cancel order?
-- Login your account and click the "Current Order" menu on the left side. Then you will be able see all of your orders you placed
Thanks