Arrogant and terrible service to client

Claim ***7- Bridgeton is their client, as one of their drivers knocked into my son on 29/11/2015 and we still waiting to have car repaired. We send all documentation on 17/12/2015 to Aon. Were told that Richard was on leave and no one available to assist and that on his return would contact my son. Well we had to call them and he said that he was waiting on the documentation. He would call my son back and we still waiting. i called him this morning on *** and the phone was ringing with no answer and eventually after several attempts he answered. Told me he will get the file and call me back. I asked him what time he will call as we had bad experience with them with returning calls. He then raised his voice to me and told me that he couldn't give me a time as he doesn't know by when he could call me back. I then demanded that he gave me a time as it was 08:45am in the morning at that time. He then became very arrogant and ****y and said I will call you at 22:00 tonite. That was when i just lost it with his attitude and told him to go stuff himself. What has happened to good old customer service. I will never recommend anyone to join up with Aon. Disgusted!!!!