You have to force the steering wheel to the left or right to turn the key and unlock the column lock pin.
Since someone tried straightening the wheels the pressure / torsion coming from the tires against the ground is trying to force the steering wheel left or right. This jamms the column steering lock pin making it nearly impossible to turn the ignition. The steering wheel should move atleast a little in one of the 2 directions making it really easy to turn the key and start the car. You can also lift the front end of the car relieving the pressures on the front wheels and it should allow you to turn the key no problem.
Above is a pretty standard ignition with the steering lock pin extended. If there is lots of force against this pin, from locking wheels while the tires are pushing into a curb for example, it will be very difficult to turn the key and retract that pin. The only way to release the pressure is to spin the steering wheel into the direction that is generating the pressure. This will relieve the pressure on the lock pin allowing you to turn the key. If the pin is damaged, bent, nicked, etc., then you may need to disassemble the column and remove or replace the pin. These pins are typically spring loaded and that is why they will "click" into place locking the steering if the steering wheel moves to far. It is conceivable that something broke making retracting the pin difficult or impossible while still being able to start the car. In this case the pin will need to be removed replaced or repaired to properly drive the car.