My question involves defamation in the state of: Texas

I have been on pre-trial diversion for 3 months now for possession of marijuana. before i started i met with someone in the probation department and they ask me a series of questions. The question were all drug related i was honest as possible when answering and admitted to drug use when i was 16-17 years old I am now 28. The result of me answering those question led to my case worker trying to put me on rehab treatment for 6 months. which to this date i have not started because she has only seen me once in the three month period I always see someone who is not my caseworker. I was not a heavy user of the drug i would occasionally use but not to the point where i would be considered an addict. I have passed all drug tests that she gives me. I have no urge to use any marijuana and I don't even think about it anymore. The main reason is the birth of my son i had an epiphany and i stopped cold turkey but my case worker treats me like some kind of drug addict. IS THERE ANY WAY TO APPEAL THEIR DECISION?