Hi, my ex has a second job where he is paid cash in hand which makes his earnings 3 times higher than national minimum wage. He doesn’t declare this income so child maintenance calculated that due to low income (from his legal employment) he its unaffordable for him to pay more than 33f a month for two kids! Please can anyone point me what shall I do or where to go to report this as it’s simply not fair on the kids at all. Thank you.