What happens if I fail to pay the ex a court ordered debt?

4 months ago my live-in girlfriend found out i had cheated on her for yrs &had a child, i cut that child out of my life for her to forgive me.I texted the child's mother some nasty msgs to leave me &my family alone & that i was happy to sign away my parental rights.I think this angered her &she took me to court for all the monies she lent me & never paid back.The bailiffs started coming in the end i applied to pay in installments, she didnt agree with what i was offering therefore the judge had to decide. What happens if i dont follow the judge's order?