Bumper Bargain? Bumper damage?

A few weeks ago a trolley collector at Tesco damaged my car with a line of trolleys, saw the damage (albeit minor) and continued on his way. I was in my car at the time; when I got out and called to him, he immediately replied that he'd "never touched it" (how did he know what I wanted then?) and then was very aggressive, shouting at me that it was my fault and coming to the conclusion that I had rolled into his line of trolleys (rolled sideways? after he had first denied any collision).

Luckily another witness had seen him check the side of my car for damage so I had back up. However when he went to get the manager who I assumed would be apologetic, he was just as rude, and refused to acknowledge that any damage had been caused.

Once we brought a trolley over to my car and demonstrated that the scratch had in fact been caused by the trolleys, he still did not apologise on behalf of the other employee, or Tesco, nor did his attitude towards me change. Throughout the conversation he was incredibly rude, and acted as if I had done something. I could go on! I then complained to Tesco about the attitude of these two men, not the damage to the vehicle itself (my car is old, and had the first man apologised, or acknowledged fault I would happily have accepted the 'bumper restore' I was finally offered after half an hour of questioning).

Their only response is that the manager did not record the incident, or has lost the incident form, so it is not in their database, so they cannot 'take my complaint further'. It is no surprise that the manager has 'lost' the vehicle incident form, given his attitude on the day, but I don't see why they need that form to uphold a complaint about the behaviour of 2 of the staff. What they have told me to do, with again no apology for losing the incident form, is go back and make another complaint in store. After the aggressive and hostile attitude of the two men in question, do they really think I am going to go back, and complain to their faces???

eleanor watson