Has anyone had success modifying child payment?

My ex’s income has gone up significantly. I am still making more but am paying her a ton.. but also got other jobs so I don’t just have to eat Ramen…

Did you go to court? Settle outside of court?

Also, am I getting ripped off paying $2500/mo for 4 kiddos at 50% custody? I’m making approx 65% vs her 35%..

T.I.A.