If your seller did not meet you to hand over the tickets, please raise an issue against this purchase in your PayPal account ASAP. They are our transaction partner and we arrange for the reversal of payments through them. Outline exactly what has happened and they will investigate the seller with a view to refunding you.
If you have any issues with the PayPal dispute, please contact our support team with your Case ID. We can then assist PayPal in the process so that it is resolved as quickly as possible.