Refuse to Pay for My Damaged Car

I was involved in an accident on 20/02/2016 and reported my claim on the 24/02/2016. My claim was only registered on 26/02/2016 after I made a call. I was told Cecilia is dealing with my claim. On the 01/02/2016 got a call from the woman who said she is the private investigator on behalf of my insurance, she asked me \Do you have a pending case\" and I responded with yes and said she need me to furnish her with my tracker record as well as my another brokers number so the she can check my previous claim. She told me she will only attend my claim next week (second week of March 2016 as she's going into a holiday). The suppressing thing is, as of now/today (03/03/2016 11H30) haven't sent an email in to the private investigator but got a call from Cecilia telling me that my claim has been decline because I failed to disclose my previous accidents, while on the call she hanged up when I asked where does that come from and did she played back the telephonically?. I called her back for a clarity and she told me her management took the decision because after I asked her about the playback she went to lectern on it and she can confirm that I only disclosed 1.Is this about disclosing?. "