I hate some of my family!!?

My great auntie died a couple of years ago and left everything in her will to me but it was never found, or that's what some of my family says anyway my auntie had always said to everyone possible that she would leave her ground floor apartment/flat worth about �150,000 to me and I wouldn't have to pay a thing as it was already paid for and all her money about �250,000 would be left in my name. Anyway the will was never found which is a lie ( I can't prove it.) Anyway although it was in my opinion stolen and disposed of so my greedy, lying great uncle and aunts would get all the money and the flat and people all over asked what I was doing with the flat and they claimed not to know that the flat was left to me although before she died they asked me infront of about 20 people what I would do with the flat so I know for a fact they stole her will what should I do ???