Divide and concur.
Measure the voltage at the battery. an audible click when pushing the starter button is not adequate. A dead battery will make the same noise.
Now that 95% of the problems have been eliminated.
If the car is a manual, what happens if you put the car in 6th gear and try to push the car by hand? Does the motor turn over?
Now go back and check the battery voltage, or just jump the car (+ to +, - to -). I suspect the car will start.