MacBook Air frozen (cold) and now it won't turn on

I accidentally left my MacBook Air in the car over night with temperatures that could've reached -30 Celcius. I have left it at room temperature for 2 hours and it still won't turn on.
What should I do? Help please!!

Also, you can try resetting the SMC. Skip the first step. It doesn't matter, it is just because your computer has to be powered off before you can perform this procedure.
Resetting your Mac's SMC
Shut down your computer by going to  > Shut Down...
Plug in your MagSafe power adapter.
On your Mac's 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: While performing this procedure, the status of the indicator light on the MagSafe charger may change. This is normal and should be expected.

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