My grandmother passed away a few weeks ago. She had three daughters including my mother who died in 2017. My grandmother told my dying mother that her will was set up so my brother and I would inherit her share. Unfortunately my aunties turned on me after mums death and my grandmother changed her will 6 months later. She left us a small gift in comparison to the estate value. In the current will it states that if the remaining two sisters die their children inherit their share. My aunties got into my grandmothers ear and made her change it, I have no doubt of that. Is there anything I can do?