If someone contacted you through WhatsApp that means you were careless with your mobile phone number, just as you are careless with your e-mail that is displayed publicly through your profile. One of the most important steps is not to make such information public, otherwise you give anyone a chance to contact you and try to deceive you in any way.

Bad people use all possible methods to find their potential victims, and social networks, e-mails, mobile phones are ideal platforms for modern scams. Do not share such data publicly, do not trust unknown people who contact you to make money and you will be safe.