How do I replace the battery in this phone

I have a Samsung J737A (2018) smartphone. I have tried to replace the battery in this phone to no avail. The phone pictured here looks nothing like my phone, the camera and flash are on top one one another and nothing else on the back of my phone. There is a slot on the left side phone facing down and I have used everything from a flat blade screwdriver to a butter knife to the point where the slot has become damaged. Help would greatly appreciated. I have to charge my phone every night in order to keep charged during the day.