Caller: suposedly Visa and Mastercard security

This caller is a fraud. The Indian lady said she was from Visa and Mastercard security and that a transaction had come out of my account half an hour earlier. But they couldn't tell me what account when I asked (Obviously) and then when I asked what type of card it was from, she told me the card I don't have an account with.. ha ha. So then of course the Indian lady hung up as she knew I didn't believe her. Total fraud. I wish these people would give up, as we are not that stupid.