Are these unwanted calls going to lead to identity theft, or something worse? i don't want to recieve them any longer!

I got the same bloody phone call twice and each time i tell them to stop calling and ask where they got the information about they just keep asking questions.......if i could reach through the phone im sure they would stop calling................

Called to tell me I had won a trip to Universal Studios Orlando, though I have never entered any contest, they knew some personal information.  When I asked what company they were calling from they stated Universal

Called to tell me i had won a trip to orlando even though i do not remember entering in the contest