What can I do if I find out my ex was hiding income and assets in child support?

I have a 12 year old daughter. A final judgment was entered ordering child support in June 2013. My daughter is medically needy (she has asthma, eczema, oral allergy syndrome, and is allergic to 48 things that we know of). I have not been able to keep a full time job for more than a year due to her medical needs and am over $20,000.00 in medical debt for her. The final order (attached) clearly states he failed to comply with DORs request to produce his W2s and Tax Returns and that his pay history from his job as a service tech had to be pulled from AWI. He filed a Motion to Establish Parenting Plan. We attended mediation and I agreed for him to have more time with her, as to give him an opportunity to step up and truly be a parent, even though I had a feeling he only wished to reduce child support. January 29, 2014, we signed our mediated parenting agreement and child support agreement, where he claimed full disclosure of his financial status (attached). I have recently been informed that he has been a managing member of two corporations with his father since before our mediated agreement was signed, and my understanding is that the annual revenue from each company is around $110,000.00 annually, with him receiving 50% of the annual income.