Please can anybody give advice?

In Jan 2010 a van rear ended my car after skidding in the snow, the third party admitted liability on the spot. So I gave my car to mercedes dealership to be repaired who gave me a hire car through Brittania Assist who were more than willing to give me a hire car. They dropped it off at my place of work where I signed for the car and they picked it up 5 days later, no problems. No price given for the car just what I thought was paparwork to take charge of it. Although I am the owner and insurance holder of my car, my husband was driving at the time of the accident and I was a passenger. (He is a named driver on the policy.)

Then, 4 months after the accident I get a letter from my solicitors saying the third party had now producted a witness who says is was my fault and because of the witness it would be pointless for me to go to court as I would lose! Obviously I was fuming over this as it was clearly the third party's fault but could not afford court costs, so had to let it go.

Now, 3 years later I have had numerous letters off a solicitors trying to recover the money from me for the hire car as they couldnt get it from the third party. The company Brittania Assist went into administration in Oct 2010 so no longer exists. My solicitors from the accident says they cannot force me to pay it as I was not the driver of the car but to be honest are not very helpful in dealing with this. The solicitors trying to relaim the money still keep sending me threatening letters implying court action, unless I pay in full for 5 days hire at £165 per day!

Any advice anyone?

Many thanks.