Bed bugs 💔💔💔

So I live in southern California we rent a house we very clean but somehow we got bed bugs 😤😳. We don't have the money to get an exterminator. I doubt the rental company will pay for it . We threw out the couch yesterday upon the discovery.

Where do we go from here ? There tons of stuff on market but idk which is best and really works .Thanks in advance for your advice