Can bailiffs take my car if its worth more than debt?

I was just wondering - having problems with Equita bailiffs. I was getting letters from them, and in February the bailiffs agreed for a short setlement to pay outstanding debt (which was approx 400 pounds). I have lots of problems with them, and it's realy difficult for me to writte about them all, but I was wondering - can they take my car if it's worth more than my debt?? And also can they charge me removal fee, if they haven't actualy came here with van and haven't removed anything??
I have been getting letters from them for 6 months, having actualy been home whole the time and not seen the bailiffs. All letters by post. And when I asked for a statement - the debt has been made into 2 separate accounts (do not know why). On both there are charges of 42.50 pounds (thats 85.00 already added) + on one of them there is a levy fee of 39.00 pounds + 160 pounds removal fee. Can they do that if no one has actualy visited my property??
Please advise as I am desperate.