Credit Cards Fraud

In my country is common this kind of fraud and all people can be victims of a con man. This fraud is that some people call you sometime in your office, home or cell phone numbers and they offer you a cheap package may be a vacation or a promotion in the bank these people impersonate an employee of the bank or the travel agency depend on the case. They try to convince customers to give the numbers of credit cards, when you give the numbers they hand up the phone. Then you check your bank account you notice that someone stole your money of your credit cards. Five years ago my father was victims of this kind of fraud someone called him when he was working and stole his money, after that my father called the bank, but the employee of the bank said that they didn't do nothing only block the cards. i remember that my father was angry because he had to pay the money.