When I applied to capgemni(A big I.T company) the graduate recruitment website returned my password in plaintext over email which shocked me because they're men

When I applied to capgemni(A big I.T company) the graduate recruitment website returned my password in plaintext over email which shocked me because they're ment to be I.T experts that do government and corporate i.t projects. Although this was a year ago, is there a way to formally complain about this? How can I get people aware?