Deceptive advertising

Not sure if I'm posting in the correct area however on the cars etc for sale by dealers is very deceptive the prices they're putting on their make it sound like that's the price of the vehicle or RV but once you get there that is not the price that's a down payment or that car is not available so why do we not require that they put the full price in their ad on top of that if you say anything they're very aggressive the AIG Sugarland gentleman was yelling and cursing at me yesterday if you're buying something you want to know the full price they can add a down payment and monthly payment but they should have to put the full price somewhere in their information it saves them time and you as the consumer can decide not only that they try to get you to apply online and then that affects your credit points and most of them won't even give you the price over the telephone or message they require you come in and we live 3 hours from where the vehicles were so it's time and effort for nothing