You only have 3 ants? How is that possible with a garden?
I had an invasion, happy flying around. Next it rained and again ants, a different species walking up and down through the cupboards (I emptied them) and the kitchen. I spray with vinegar and leg een lijntje bij de drempel met bloem. Dat zal ze leren als ze hun poten aflikken (of niet, de hond likt het op).

I had a hole too. I filled it wit concrete. If you ask me that's cheaper and easier to push in. It stopped the rain but not the plague of insects.