There are some few spiders that feed on ants, while not really expensive, you buy them for pest control, it can be.
Preying mantis will eat ants, so will assassin bugs.
Frogs and lizards might feed on ants if really hungry but I don't think they like the formic acid.
I have seen the little house geckos eat anything insect.
Pet trade, some of those can get pricy.
You can deter ants with a light dusting of cinnamon powder where they crawl and trail. Ants are scavenging for food, you find that source and rid it, the ants soon leave.
The small black sweet ants go for sugars and decaying fruits and such. the larger harvesters are after meats and fibers like vegetable.Anything decaying.
Not such bad guys, one of natures little janitors like woodlice and earwigs, just considered pest in numbers.
I just find them fascinating unless overrun by them.
I sit on the patio and watch the pavement ants cut up and carry off remains of a scorpion. Not long the only thing left is a small grease spot.
Note: I for one do not condone the use of pesticides. If ant bait traps are not working, likely wrong bait for that sort of ant. Still no luck, go natural before toxic chemicals.