survey about credit card service. no personal info was asked for or given

i got a call from this number this morning too.
they said i have won or i can win $25k and a trip to Australia.
they asked if i m married/single, hobbies, graduation.

the voice was craking therefore i couldn't understand from which company/service they were calling

Got a call tried to call back its invalid second time today.  Another number called as well same thing invalid when i called back, maybe someone trying to clone numbers.