Multiple marriage

I have been married for 13 years. Little did I know my husband has been hiding a secret from for the longest time. I have had so many questions left hanging until now. Finally, Pandora's box was opened and all the secrets came out. I know for sure that my husband loves me but I just can't accept the fact why he kept this for so many years and deprived me of the things I should have enjoyed. Now to make the story short, I found out that my husband had 3 marriage certificates. He was married for 3 times. I was the last. Now I want to know how I can nullify my marriage? I know that my marriage to my husband was void from the beginning.

file a petition to have your marriage declared by court as void.

How long does it take? How much will I spend?