Digital products are non-refundable once downloaded, because they cannot be returned. That is the standard position and we state it plainly rather than burying it.
Use our contact form and include your PayPal order number. We answer within two working days. If the problem is on our side you will not have to argue for it.
Please contact us first. Nearly every problem we see is an expired download link, which you can fix yourself in seconds at Find your downloads without waiting for anyone.