Worst service from dial direct

I launched a claim after I was hijacked,it took over a month for dial direct to come to a conclusion and they declined a claim,saying that I gave false information of which I provided correct and honest information. They claim that the information provided regarding the vehicle repairs happened in November 2019 is wrong and that’s one of the reasons they declined,of which I don’t understand what’s that got to do with the hijack happened in February 2020. They also claimed that I didn’t call 10111 reporting the claim and the lady who handled my claim had adviced that she couldn’t find the information that I called the police,then I went to the police station myself and I was provided with that information in less than 5minutes,which means she was dishonest and didn’t do a proper investigation and just jump to rejecting my claim.