How do I get valid card numbers? (without having to buy) please help

[french123]

I've tried all the ways I know, dork, google dork, sqli dumper, havij and never got, no card number and in that there is an acquaintance that always has, there I buy from him, and he does not teach how he gets the data from card, can anyone help me? I can not afford to spend money buying cc info anymore