Judgement of Resitution - now turned over to collections. How can they demand 103K in 30 days?

I have been paying court ordered restitution to the court for 9 years. Now I received a letter from a attourney stating I have 30 days to pay 103K. I have not won the lottery and take full responisbitly for my actions, but with a felony on my record, I have a very low paying job. Now on linkedin have been being harrassed from the victom, stating your done, taking you out. Can you be harrased like this? I have saved all the messages from him. I am doing all that I can, and willing will pay him off if I have a winfall. Can he go after my husband checking accounts or my retirement accounts? I am very stressed about this, cant sleep, I guess he is getting exactly what he wanted.