I too received a call from Christina at KM. She described that I won a FREE campsite from Camping World [where I haven't been for 4+ years]. It only took a moment to see the way this call was heading so I cut her off, and asked to be removed from her call list.  
I could smell scam by the second sentence. The prior writeup confirms it.

I have received a total of seven phone calls from this number (so far) stating that, "this is Christina calling from KM. We are showing a credit on your account  with us so please give us a call so we can get this taken care of".

The message sounds very much like that of a collection agency.  I suspect they got my number because of a recent visit we made to Camping World which likely according to others on this site is fairly common unfortunately.

I called the number once (from a different phone line) and it went straight to the voice mail for "Christina".