5 year german roach problem, any advice?

Since my mom fell into a deep depression about 5 years ago, there has been a decently bad german roach problem. I’ve tried all different kinds of sprays and nothing has permanently gotten rid of them.

I moved the fridge to clean and there were balls of sheddings. They only come out at night (around 10-15) but now they’ve started during the day.

In her drawers i’ll find at least 3-5 eggs. Is it thousands or maybe hundreds? I’m buying Advion roach bait in hopes to get rid of them. Yes I clean everything and leave no open food out. Any advice?