Property damage limit
You should also find out how much you will owe in excess of the property damage limit. If I was in your position, I would also like to know if there are any bodily injury claims being made in addition to the property damage claims. If so, I would want to know if I had any personal liability for those claims.
Generally speaking, insurance carriers are only required to cover damages up to the amount of your applicable limits. Absent other factors not mentioned here, any damages in excess of those limits are generally your responsibility.
Hire a lawyer
hire a lawyer to review this. its possible that the insurance company failed to settle this matter when it had a duty to do so. a lawyer versed in handling accident cases should be able to review your policy and the actions of the insurance company and advise you. you must act because in some states the failure to pay could result in the suspension of your license.