Child support

I need help ): so my husband's ex wife is screwing us on child support , she takes 60% of his check so I end up paying 90% of the bills and it's stressful ...idk what to do? We tried des , courts , nothing helps all she does is live off his money & he doesn't even get to see or spend time with his Daughter ...please idk what to do , sometimes I think walking away is best but I love him so much. I just don't know anymore.