Pnoned several times and I didn't answer. When I did answer, there was no one on the other end.

Its an ad firm. Just tell them to put your number on a do not call list

Tell them off, it's a scam for winning stuff but you have to give them a credit card to pay for shipping

.....caller calls and does not respond....

It's somewhat a scam  A guy asking for shipping address and credit card # as he has something to send a package but don't want to say what's the package and from whom it came from.

Male sounds like 24-30yrcouldn't hear me so asked me to call back decided to do some digging and found this website wanted personal info  which i wouldn't give  which included address, visa ,  etc