It might be an app/apps that is draining your battery. It also could be spyware or virus. Go to battery and see wat is draining the battery. Go to battery and device care to see what is draining the battery
Turn on airplane mode. If it switched you wifi connection of, swithc the wi fi connection on again. Remember to switch airplane mode of again after loadshedding.
There is an option. You press on space were it says 34, 54 and then it opens showing 24 at the top. Cant remember if I only swiped up or pressed on it. You also have to claim on the phone you bought