Getting off

So I'm not gonna be getting off until I finish up a couple things but I'll finish my class & community service by the end of the year and hopefully get off then (which is great because I'll only be doing 1 of 3 years I was supposed to do) my only concern is the place I go to for my class is expensive and I've racked up quite a bill during my time there. They told me they won't say I've completed until I pay them off but I also can't stop going there until it's paid off which is a horrible system because I'm constantly adding hundreds of dollars on to my bill every month between class, therapy, and UAs. Basically my question is when I finish the class I'm done there so shouldn't they be able to at least tell my PO that I finished the class? I want off probation but between being alive and everything else it's gonna be hard to come up with an extra 3 grand by the end of the year. I'm wondering if anybody has dealt with anything similar to this situation. I think going through a government ran health department was my first mistake.