I can't get my fridge to turn back on after...

Question

It's a Kelvinator Classic fridge/freezer and I defrosted it by switching it off, letting the ice in the freezer compartment melt and then I cleaned the inside. When I plugged it back in again it doesn't want to turn on again. I did check the plug, that's not the problem. I know these fridges need to be level in order to work and I might have shifted it around a bit but I have the fridge postioned as level as possible and it still doesn't want to turn on again. Please help and thank you!