Crooked as they come

OK I just got a call from Camping World located in Midway Florida. I was told that the guy that I had dealings with told her that he made it quite aware that I was getting a credit card..... WRONG!!! He never mentioned Credit card and when I told her I was only ask for two things, income and my date of birth she stated that I also had to put in my last four of my SS. We are in the process of looking for our retirement home and that opening up another credit card will hurt my credit score and possibly cost me more money. I told her if I was aware why did I call just minutes afterwards and cancel the card out in the parking lot. This a scam and I just wanted to let others know so you don't get scammed like me. I guess I not as smart as some here are making out to be.