Answer by Bevan for My prerelease app has been "processing" for over a week in iTunes Connect, what gives?

I faced same issue, I uploaded ipa via Xcode7 and it get stuck for 48hrs.Number of times I mail to apple support but it won't workso I uploaded ipa multiple times, but no usethen I made change in version number e.g. 2.2(33) to 2.3(1)and it works for me. So try at your side may be this will help you.