Many thanks for your question.
Very simply this sounds like a case of vicarious liability. This means that an employer / contractor is liable for the acts of its employees / contractors which are carried out during the ordinary course of business.
Therefore you can get quotations to repair the damage and bring an action in the small claims court against the company and the individual.
You need to write to them first formally demanding payment to cover the cost of repair to be made within 21 days of the date of the letter. Failure to do so will result in a claim resulting in you seeking to recover any court fees and 8% interest.