HELP how do I get rid of mice?!!!😭

I live in a townhouse and my neighbour is an alcoholic. He left one day and never came back. His house was abandoned for over a year. We complained to the town about his overgrown yard and the state of the house but they never did anything. Long story short the house was is disgusting and mouse infested. It was sold and new owners are currently cleaning it up. I heard scratching a few times and have just found mouse shit under my sink where I keep my garbage bins (which I will empty every night now). Also in the drawer under my stove that probably had some crumbs we never use it. I think the mice came from next door. It’s a newer house 3yrs old we checked all our vents and the foundation in the fall and didn’t see anywhere mice could enter we have screens. How do I get rid of them. I’m so devastated. We placed traps that will electrocute them when they enter, where we found droppings but I’m worried more will find there way in from the house next door. Also we can’t really call pest control with COVID. We will have to talk to our new neighbours. Anyone successfully got rid of mice!?? What did you do? I have a ten month old so we won’t be using any poison .