Here is some advice. Lawyers don't give a crap about your vehicle, nor the rental. They only care about your injuries and taking 33% of YOUR injury settlement.
For the insurance to stop the rental, they had to have a reason. They either totaled the vehicle and stopped it, or, they are disputing fault. Once insurance stops the rental, then you are on the hook to pay out of your pocket.
IF, you had injuries, and if you are still treating, and (IF) you are not at fault for this accident, then NO injury settlement will be made, till done treating, and they get ALL of the doctors reports of your injuries, and then they will review and make an offer to settle with your lawyer. My guess, this will take on average of 6 months to a year or more.
Here is another fun fact to think about. The 1st lawyer you had and fired, can have a LIEN on your settlement also, and could end up paying for 2 lawyers and have seen it happen.
What you do, is make an appointment (in person) with your lawyer and ask the lawyer what you need to do. This lawyer needs to EARN his money, and a bunch of strangers cannot answer since we do not have the facts.
They are often quite good -- especially where the system is that there is a professional corps of public defenders. In some places, there are problems where inexperienced people take on criminal defense for the money -- so I'd just ask about the amount of experience your lawyer has in both the type of case your husband has, and the court inn which it is occurring. It would also be good to know how much experience your appointed attorney has with the other side.
But you should not go in thinking a court-appointed attorney is necessarily a bad attorney. Not at all.