Need advice on child support decision

Hey everyone I’ll just get right into it, I put my child’s father on child support when my son was around the age of 2 years old because he didn’t want to support me with daycare expense leaving me to pay his daycare full for about a year ( he was very inconsistent in helping me with other expenses like food clothing etc maybe 50-100 dollars every other month or so ) when the court day came they ended up making him pay 800 dollars a month not my call I have no idea to why it was that amount ( thinking because his mom has a lawsuit with the state ) … fast forward to now 2-3 years later he owes a lot of money because he doesn’t pay it and now wants me to terminate the child support order … I think it was unfair for the courts to make him pay that amount however like a said earlier he is extremely inconsistent and I can’t depend on him I feel like I need this child support order just with a lower amount moving forward. I think he should pay me for the daycare expenses I had to pay on my own because I literally made so many sacrifices to pay that on my own … I plan on calling the office tomorrow i don’t know what to say I want him to at least pay me for the daycare expenses I paid on my own lower the amount he owes and have a lower payment so maybe he’ll actually help me and pay it ? What are y’all opinions I’m only 23 looking to learn and try to understand