If the tickets are not as described in the listing (e-tickets rather than paper tickets), you are eligible for a full refund. Please contact your seller and ask them to issue you with a full refund via PayPal. You must not use the tickets as you would no longer be eligible for a refund should you do so. 

If your seller will not issue you with a refund, 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. 

Again, you must not use the tickets as you would no longer be eligible for a refund should you do so.