I am a US citizen female . Imarried an illegal alien and obtained an annulment 4 months later. I filled for annulment because 3 motnhs after the marriage ,I found out that he is in fact still married to another wife in his homecountry .The other wife was living with his mother and also he was cheating on me with his mistress in the U.S

I called the Immigration few months ago and reported him.They do not seem to care ,it's like this guy is not a priority to them or somehting. I am worried this guy would hurt another US woman.I think he deserves to get deported from the U.S

Any suggestion on legal steps to take to finally have this looser deported.