Go back before the court and ask for a reduction in your monthly payments or a conversion to public/volunteer work service.
There was one judge whose court room I was always in in San Francisco who used to say to defendants who complained about their fines and fees, "Look, we don't have debtor's prisons in America anymore. Pay it or don't." As far as I know, they can pursue a civil judgment against you, but they can't violate you on your probation unless you really can pay but you just refuse to.
I hope more people read this, a felony on a person's record can make you life difficult, Think about it before you do something stupid,
My name is Stephen R. Cohen and have practiced since 1974. I practice in Los Angeles and Orange County, CA. These answers do not create an attorney client relationship. My answers may offend I believe in telling the truth, I use common sense as well as the law. Other state's laws may differ.. There are a lot of really good attorneys on this site, I will do limited appearances which are preparation of court documents it is , less expensive. However generally I believe an attorney is better than none, but many will offer a free consultation and a face to face meeting generally will be better, I like my clients to write a short one page history of the fact and questions they have prior to meeting with them, so nothing is forgotten.