Is there a way to prove that a company sold your information to a third party?

So yesterday I filled out an online survey and at the end I was able to enter for a chance to win a $500 gift card. It required you to enter your email address and phone number. The privacy policy stated that they will only use your information to contact you if you win and will not be sold to any third parties. Today I’ve recieved half a dozen phone calls from strange area codes, I answered a few of them and they were automated messages : “Congratulations you’ve been selected to win a trip for two to Hawaii..” and crap like that. Is there anything that can be done about this? or does it more or less fall under the ‘what did you expect’ catagory…