My Car refused to start despite all trials

it is possible that the key batteries have died in which case the car while not respond to the key being pressed, if you have the spare key you can get use that, if that works you will have to get the batteries in key that is being used replaced and have the key re-programmed to your car, if it doesnt work then there is possibly a module or wiring fault that you would need to go to a mechanic to get replaced/ fixed.

have you made sure that the car battery isnt flat? it wont work the central locking if it is