Welcome to the Soul forums.
Your car battery is flat. The voltage is too low to operate the locking and immobiliser circuits. The only thing that may still work is Hazards. If meter handy check across terminals should be 12.5/6
If the battery is 5 years or older buy new one .
If younger try recharging.
Only charge on car with an intelligent battery charger, of no more than 5amps max. if not sure if safe remove battery from car and charge
to bring the battery back to reasonable state you will need at least 42 amp hrs. that is 3 amps for 14 hrs approx.
At the end of charging the battery should read 12.6 volts .
Connect to car run engine and check alternator Ok. at 1200 rpm voltage across battery should be 13.8 volts.