Donations are currently seeing a problem where a payment will go through, but no package will be received in-game. This is being investigated and will be rectified ASAP. All packages paid for but not received will be applied manually once this has been resolved.
You have to find the UETF applications thread. You copy and paste the thread and then fill it out in a reply. I recommend, highly, out of your sake, read the lore heavily. That way you will be more familiar with the type of RP you should expect.