If they are tiny ants, they will be pharough ants which are a pain , and hard to get rid of once in the house.
DO NOT try spraying them with ant killer , as this just makes the colony split up, and there are more than one queen in a colony. This just makes them colonize all over the house.
It’s a long job, but, if you can get some boric acid from the chemist, mix it with smooth peanut butter and Castor sugar, ( a teaspoon of each.) then get some drinking straws and fill them with the mixture, then cut them into 1 inch lengths and put them everywhere you see the ants following each other, they will take the bait back to the colony and this will kill the colony. It may take some time and patience, (over a year or two,) to see them all off, but it works.
Had them in our house, but because I knew how to get rid of them, no longer a problem.
Or you could go to your local Town Hall and see if they know anyone who would fumigate the whole house.
Hope this helps.