It’s a scam. I overheard my mother answering his questions like age etc. took the phone from her when I heard “VISA”.
Tell this scumbag you’re on “do not call list and you’re reporting them” (AND THEN DO!!!)
If you not currently on DNC list or it has been more than three years you should update your info on the National do not call list type it into google its very simply.
Once your registered on the DNCL you can report them.
After a number of complaints they will take action fines ect.
good luck,