Try this: https://www.craftylittlegnome.com/how-to-kill-ants-with-borax-make-diy-ant-trap/
Seal up all areas where they may be sneaking in then diatomaceous earth sprinkled at entrances and anywhere you have seen them. When they come in contact with the dust, it will kill them. Also, inspect your yard for mounds and get rid them as well. You can pour boiling water in the center or Jiffy corn muffin mix or sevin granules.
I also use Terro. Works every time!
I use peppermint essential oil and apply to the area that the ants are coming in
draw a chalk line where they are coming in, they won't cross the chalk