App store on iPhone 5 acting up?

I recently bought an iPhone 5S and am trying to update my Skype app in the app store, due to the notification saying it's needing one. I click on the app store and try to update it, but instead I get a little pop-up saying "The item you tried to buy is no longer available.". I used the Skype app earlier, so I know its not unavailable.

How can I update it now?

Try looking for it again tomorrow. Best luck.
http://www.todaysiphone.com/2014/06/skype-gets-removed-app-store-company-prepares-5-0-update/

Hi! I suggest you reset your device and try again! This doesn't look like a major glitch, but more of a connection issue maybe. You might also try connecting your iPhone to your PC and find out if you can upgrade via your PC's iTunes. I had the same problem a few times, but never really worried about it as it normally gets sorted in some way or another. All the best!