Do you have an order confirmation Email? A record in your Bank's online transaction history? These are proofs of receipt so in the event Launch comes and you don't get access to the content you preordered and you can send ZOS an image of one of those to show you made the purchase.
LADYKiLLER wrote: »Same thing just happened to me. No confirmation e-mail received, just proof of the money being taken via transaction history.
stewhead2ub17_ESO wrote: »I went to the website from in game Crown Store & had no problem with my order going through.