Same thing happened to me, when I told them I wouldn't verify my address and SSN because they wouldn't tell me what they were calling about other than "a personal business matter" they got huffy and said we already have your social, we just need you to verify the last 2 digits I said no, they hung up
The same thing happen to me, they wanted me to tell them my information like I am craziest. What kind of fool do they think I am giving my information to them like that.