Plumber Job in Bridgewater, Nova Scotia

Wondering if you can help us with rats entering possibly through some old uncapped pipes? Not sure how they’re getting in but they are in the walls, floors and ceilings now. Not inside at all yet and no traps in attics or home have gone off. We’re desperate to locate and boot them out. Plumbers say they aren’t exterminators and have tried smoke tests and sewer line inspection (we have back flow valve). Need to locate possible uncapped pipe from old renovation that rats are using to get in or find other solutions for their entry and exit. I am in Bridgewater, can you help?