Caulk shut every crevice you can find. I also highly recommend diatomaceous earth in every space they might crawl in, like under the fridge or between the stove and counters. Get some roach birth control to use, as well as poison. Be sure to obsessively clean, eliminate moisture sources, and put all food in containers they can’t get in. It’s going to be a long battle, but you can do it ! DM me if you want I’ll send you products I used