You can only cancel IF the word cancel is sitting next to the word unclaimed in your paypal account. If not then IF it remains unclaimed paypal will return it to you at 30 days post payment. BUT keep an eye on it as its possible if the seller is new that he does not realise that he has to claim the "first" payment and so it may complete and he send your item before the 30 days is up. Sounds just like a confused new seller. If it completes and he does not send the item then you can always file a dispute for non receipt of item.
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