HELP!...What can I do to keep fridge cold and food safe?

Keep the fridge FULL - this will act like a cold reservoir
I keep 3 or 4 Quart bottles in the freezer and let them freeze;
Every 12 hours, take a bottle out of the freezer and move it to the "fridge"
which keep the temps reasonable.
When you run out of bottles - buy a bag of ice and repeat......

I have gone several days "of the grid" doing it this way and keeping the food
reasonably cool.