Hi everyone new here and having trouble getting the car to start on its own. Recently went to the supermarket and when I came out the car wouldn't start`so bought some jump leads to try and start it, nothing happened so I had to push start it. It's a keyless ignition with a keycard and a start stop button. Since the incident the engine warning light is illuminated when the card is inserted and after about 10 seconds a warning light comes on saying "battery low start engine", since then I charged the battery using a battery charger until the charger said fully charged and then tried to start the engine again, still nothing and then same error message.

Does anybody have any advice?

Thank you for all your help.