Paypal staff do not read these ebay forums (and for the most part neither does ebay staff).
* Contact the seller directly with your request (link is with your purchase information -- More actions menu)
* If that does not work then use the Help & Contact link (top and bottom of this page) and open a case (there are time limits for ebay protection).
* if the ebay protection has expired, then open a case on paypal (up to 180 days from time of purchase)
...
Or did you mean that you want to cancel your purchase before it is shipped?
-..-