Find out who they are contracting for, individual, CoCo, or whoever, and make a complaint there. Offer photo evidence, etc. and the name of who you spoke with on site, etc., if you have details. The contractor had a dutry of care to road users to provide safe passing, or close the road and redirect you, and the damage would suggest that they were negligent. Try nicely with whoever commissioned them and if that doesn't work, try the solicitors letter.