Attempted root failure. Kernel Rev. Check Fail.

Im not sure if this is the right place to post this, but I attempted to root my phone last night, which I did successfully. My carrier (telstra, australia) is really ****ty with releasing updates so I'm still on 5.0.2. So I followed these instructions to update to 5.1.1: http://forum.xda-developers.com/show...55&postcount=3

I did that, and when my phone rebooted it got stuck on the boot screen with "Kernel rev. Check failure".

I have tried to flash my carriers stock 5.0.2 firmware with Odin, but that has currently not fixed it. Do i need to wait until they release 5.1.1? Or can I use any countries 5.1.1, for example, im currently downloading a stock 5.1.1 firmware from India. Will that work?

I don't know what else to do.

I think where I went wrong was not installing a custom kernel other than Supersu, which I now realise thats what the previously linked instructions said. I rooted with Ping Pong root, so I do have SuperSU installed on my phone, but I do not have TWRP.

I know, i'm a dumbass. What can i do?