Let me lace you with game. This shit works hella good. Get some instant grits. sprinkle them where the bitch-ass ants are. they take that shit back, feed it to the colony and die with the quickness.
Also: if you have them in your house, and you can see where they are coming in, plug that hole with toothpaste. Not the Toms of Maine bullshit, but toxic motherfucking
Crest or Aquafresh. They won't fuck with that hole again.
If you follow these methods, you should be good.