S4 Active i537 not booting

So, I am in desperate need of help. I tried updating from the 4.4.2 NH3 firmware to the newest Lollipop OC7 firmware using the provided method (which was through the app). All was going well until my phone rebooted and instead of continuing the update process it booted into recovery. The phone's up volume key is broken, so it is always causing the phone to boot into recovery if I do not hold the volume down key. When I make it past the samsung screen, all that happens after that is a blank screen. Booting into recovery tells me that the recovery version is i537UCUCOC7. Any help is much appreciated.