Contractors caused damage to my wall.

Incompetent contractors have damaged the pavement outside my property, undermining my retaining wall, which is now cracking and risks falling down. Cannot get hold of anyone at lightstru k who is prepared to even come and assess the damage. They keep ignoring me or passing the buck onto someone else. So you cause the damage and leave the homeowner to sort out your mess? I'm sorry but I will not let this go unchallenged