If she has an attorney, You might never get it reduced, It's not about who is wright or wrong, It's about who's lawyer is better.
That said,
You need to file a petition to the court to have the amount reduced. You will need proof of income, and if possible have hers as well.
The court staff may help you to gather the papers and explain how to fill them out, but, It's not likely. Thats not their job, and they will soon tell you that.
I hate to say it, but You need an attorney. or you may want to leave well enough alone.
Good luck.


