Is there some kind of law against a business offering a phony sweepstakes.?

In Arkansas there are many businesses offering sweepstakes awards to try and get you into their store. When you arrive at their store they tell you about everything they have to purchase and try to put off your questions about the sweepstakes. Then try very hard selling you something and you finally said no and decided not to buy anything, they tell you that there isn't any sweepstakes. They only send you the sweepstakes offer to get you into the store. One of the most advertised fraud sweepstakes is Direct Buy $50,000.00 Makeover. Contact them to make an appointment to come in and they will give to a key you can match to see if you have won. I have been there and done that, waisted about 3 hours going through their introduction to their club and being hustled by 3 individual salesman, who try to make you sign up to a $4,000.00 dollar membership for products you know you can buy without their membership for less else where. I asked several times, can I please have my key, and they changed the subject. When I finally said no to their membership, I asked them if there every was a sweepstakes and a key. They told me, Oh yeah!, come back in and talk to our salesmen and we will give you the key. Meaning another 3 hours of hustling you. If there isn't any law, then there should be, because you come out feeling cheated and wasted a lot of time for nothing.