Can somebody please advise?

I just got a telephone call-- 100% certain it is FRAUD. . . I was informed in voicemail to call back at 210-926-7286 to the "Social Security Administration", and I was being "investigated for fraud."

I, of course, called back, as it made me VERY angry. . The asshole who answered the phone got an earful, and I asked him, "Since when does the Social Security Administration call US citizens and tell them they are about to be 'investigated' for fraud?"

The motherfucker hung up on me. . .

I know they are defrauding people. . . My question. . . . How does one report this and to whom?