Hi .. You're a new member with lots to learn. If you look at the shipping/payment of that listing will see..
United States Local Pickup
Will ship to Worldwide..contact the seller for additional shipping cost. If shipping cost is not stated in that section , never bid/buy without asking seller for cost first..use ask a question
As toby_le_pue stated , there are consequences for not paying and sellers are not obligated to cancel but you can try. Apologize , being new , not understanding how ebay works etc.
If seller agrees to cancel and files , ebay will ask you to agree and be sure to accept. Otherwise , seller loses a big fee charged by ebay through no fault of theirs.