You don't say how long ago you purchased the stamps. If the photo is not displaying properly in your Purchase History - which it sometimes doesn't if some time has passed since the date that you purchased the item - then run a search for that item again. When the search results come up click on the "Sold Listings" option in order to see the original advert. If you click on the advert when it appears in the Sold Listings section then you should be able to see the listing exactly as it appeared the first time you saw it prior to purchasing the stamps, in which case you can view all of the photos included in the listing to ascertain which stamps in the listing you have and have not received.
If it has been less than thirty days since you received the stamps then the best option would be to open an Item Not As Described case in relation to the transaction. To do so go back to your Purchase History, locate the transaction in question and click on where it says "More Actions." This will bring up a drop-down menu with a range of options for you to choose from. Click on the option at the top of the list that says "Contact Seller" and when the next drop-down menu appears click on the fourth option from the top that says "I received an item that wasn't as described." This will automatically open an Item Not As Described case for you in the eBay Resolution Centre. The seller will then have three days to resolve the matter satisfactorily. If after three days the seller has still not resolved the matter to your satisfaction then escalate the case to eBay for them to make a final decision on. eBay tend to be very biased in the buyer's favour so if you had to escalate the case to eBay it is likely that the case would be decided in your favour, with eBay forcing a refund of the amount that you paid when you purchased the stamps.
In the event that you have run out of time to open an eBay case, or if you open an eBay case but it is decided against you for some reason, then log into your PayPal account and open an Item Not As Described case there. Unlike eBay, who only give buyers thirty days from the date of receipt to open a case, PayPal offer buyers one hundred and eighty days from the date of payment during which to open a case against a buyer. However, if you do have to go down the PayPal route make sure that you escalate the case after two days and before the twenty day cut-off point. If you let the case time out then you will not be able to open another case in relation to the same transaction.
