Rat problem?????HELP

We recently bought a new home a couple months ago and we noticed there’s a rat problem in the attic and maybe in the walls....we keep hearing noises so we called a few exterminators and they’re all $5,000+++ we really can’t afford it. We tried going up on our own with masks and ventilators and we made a mix of bleach, baking soda and water to spray up there for the rat poop, got most of it cleaned up we couldn’t get some parts and we thought we sealed up everything but now we hear even more noise and it’s taking a toll on me. I don’t know what to do anymore 😭😭😭 right now with all this corona virus stuff it’s just worse, since we’re both not working and only have one small income now. Has anyone had any type of issues like this and what did you do? We’ve tried rat traps and cleaning as much as we could but nothing.