Bottom line is this isn’t grounds for a refund. You won’t be the first to try going through a PayPal dispute, and believe me the outcome for those who tried was not what they were expecting. Disputes aren’t a one way street, PayPal actually investigates individual cases and gets in contact with all parties involved. You will only have wasted your time and as this thread has shown gain a bad name amongst sellers and the community for even trying to take this out on creators. If your purchases were offline indefinitely you would have a case, but one day isn’t grounds for a justifiable complaint let alone a refund. It isn’t any of our fault that you decided not to download your content that you purchased all year, or that the day you chose to download it the servers are down.
This is actually why I download everything I purchase from the marketplace. Because you will never be without downtime, and it’s better to have it on your harddrive than in the cloud somewhere. Especially for expensive purchases.