If the funds have not yet been withdrawn, you can recall/cancel the Z CODE. Simply search of the payment by clicking on the "Search payments" option
A list of the the payments made by your company will be displayed. Search for the payment using any of the following transaction details;
When you find the transaction, click on the cancel code icon to cancel the code.
Once this is done, the status will change to "Cancelled". if this does not happen immediately, refresh the page.