Works under the table not paying support

Long story short, november of 2019 he had hernia surgery so he was off until February, but started working at a landscaping company for half of what he was making before in February up until his accident, then in march 2020 he got Injured in a side by side accident. Anyways we've been in and out of court so much (him taking me). (He got a settlement from the accident but blew through it already) But now he "cant work" because hes disabled. He was on disability and decided to plow snow in the winter (some on the books, and some off the books) so was taken off. He just informed me he quit his job. But I've had multiple people tell me they seen him doing landscaping and delivering pizzas (under the table). Is there anything I can do? He only gets them every other weekend. I'm so tired of going back to court and him not paying.