I've tried on Steam to find an answer, left a request with Steam Support, tried everything, but nothing helps. I can't log into the Steam store to buy the DLC. I choose my items but when the login comes up and I click sign in, it just sits there. Nothing. Anyone got any ideas? I've tried it with three different browsers. Thanks.

Have you tried using the steam application?

Yes, I get the "you don't have any money in Steam Wallet" and a messed up page that will not let me choose a credit card then when I try to add money to Steam wallet, it just sits there. I hate Steam. I've never had so much trouble trying to buy a DLC. It's costing me DLC and Bethesda money because I looked it up and others seem to be having this same problem. I don't know what to do.