and just to be clear, there is a new method for cancelling an order when you really want to:  no need to wait 4 days at all

 

 BUYER WISHES TO CANCEL – HAS NOT PAID

Thanks to fuggsy on ‎01-13-2015

To cancel an order with the new system is so simple to do... easy as and no defects or issues using it

I have done a heap of order cancellations over Christmas for both unpaid and a couple of paid orders and did a straight unpaid one 5 minutes ago and its 3 click of the mouse and NO DEFECTS

Click the down arrow and select “cancel order

CHOOSE the reason from the drop down menu... Only 2 choices... Pick this one  The buyer asked to cancel the order...

Click continue and its all done...   and no defects  and if the customer had already paid eBay and PayPal do the refund as well and again NO defects

The emails ebay send to you and NO DEFECTS at all... NOT one

 You agreed to cancel this order

 Hi XXX

We let the buyer know that you want to cancel this order

Here's what you should do next:

If the buyer paid for this order, you should refund the order total and any shipping costs. We’ll ask the buyer to confirm they received the refund.

 and then this one 

You successfully cancelled an order

 Hi XXX

You cancelled an order from jYYY, and we already notified them. You don't need to do anything else because the buyer hasn't paid for this order yet.

You'll get a final value fee credit in your account that you can apply toward listing more items to sell on eBay.