OP i'm sorry to hear their reply, telling you that this could have happened anytime is the biggest cop out i've heard, there is no way i would leave this there, they have a duty of care & responsability & they shouldn't be allowed to get away with it, I would write a letter to them stating all the facts don't let your feelings go into the letter keep it very professional, telling them that you req the details of their insurance co because you intend to make a claim & if you don't recieve this information within 7 days you will be contacting trading standards & reporting them. If you don't feel you can write such a letter then just contact trading standards direct & ask their advice, you could also contact CAB who will give you advice, but to be honest i would go straight to TS who do have some clout. I wish you the best of luck.
a quick goggle search only brings up an air conditioning co is this the one ?