Ask the seller politely to offer you a Mutual Cancellation. He is not required to do this. If he does, accept it promptly and leave positive feedback.
If you do not pay, and he does not want to offer the MC, he can start an Unpaid Item Dispute. If you do not pay, you get a Strike on your account which may Block you from bidding with thousands of sellers who do not want to deal with deadbeats.
In future, before bidding, ask the seller any questions you may have. Don't bid just because the item closes in a few minutes, another will be along Real Soon Now.
In particular, ask about shipping to Canada and the cost of shipping here. Tracked Shipping starts around $20 to $25. Some sellers will adjust to the less expensive First Class International if you ask nicely.
