You can view your pending withdrawals at any time by visiting the withdrawal section of the cashier and clicking the magnifying glass icon next to your pending payout(s):

You can see the current status of your pending withdrawals as well as a history of your previous payments using the drop down menu.

Withdrawal requests can be cancelled at any time. This will return the funds to your playable balance in the casino. Cancelling and re-requesting a withdrawal will not delay your withdrawal being paid. Use the check box to select which withdrawals you wish to cancel.