Shocking service

In April I stopped at a stop street(being a good citizen) and the person behind me drove into the back of my car. He assured me he had third party cover with Alexander Forbes. I sent them all needed paperwork and got an email saying a person would be allocated to my case in a couple of working days.... NOTHING.... I tried emailing.... No response... It's now been almost a year and I'm still driving with a dented car... Their client service is absolutely shocking. I get the feeling they're not going to make enough money from my case, so they just don't bother. It's so frustrating. I didn't do anything wrong, their client damaged my car. If they do not want to pay for the damage then their client should. This is not suppose to be my problem.