Macbook air keys not working and now unable to boot up

Really frustrated today. So this is basically what happened. My macbook air 2012 was fine this morning but after i had lunch and came back to it alot of keys were unable to work. There have been no water spills or anything like that. I tried every possible solution and then i realised my software was out of date and decided to update to latest software. However while installing the new updates a message popped up saying an error had occured and i was left with a blank grey screen and a pointer. I waited a few minutes but still nothing had happened. Then i decided to shut down my computer and after i rebooted i was gretted with this
panic(cpu 0 caller 0xffffff8002c59241): "unable to find driver for this platform... etc etc
and the screen just stood there with a screen full of words. I searched for a solution to this and realised i could reinstall OSX by pressing cmd R and reboot but jus to my luck the key R was one of the keys that wasnt working. So now im kinda screwed not knowing what to do. Im probably gonna take it to Apple and see if they can do anything but for now does anyone have any suggestions??

Since any diagnostics at this point are utterly deadlocked, no; however see SMC reset below for last chance option before appt. with Apple
re-verify still the same.
Make an appt. with your local Apple store for full diagnostics and possible reinstall of your OS.
I hope you had a backup your vital data on your machine, a complete restore may be required, though that is indeterminate.
Peace.
See if you can perform a SMC reset to get out of same:
SMC reset
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer. 
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.

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