How can I locate the Will of my grandfather?

My Grandmother died in 2009 and apparently (according to the rumor) she signed everything over to my aunt before she passed. To make a long story short my grandfather who preceded my gma in death had a Will and it stated that my father was to get the house and some other items were left to his brothers and sisters. Well my aunt kicked my dad out of the house and none of the grand-kids got anything, not even a damn picture and I just want to find out how in the world can I find this Will. I have been to the probate court and they are telling me that there isn't one on file although i know for sure there is one. I cant really afford a lawyer and I feel like I am stuck between a rock and a hard place because this really isn't fair and I have been trying to look online for the past 2 yrs for answers and I'm all out of ideas. Can anyone help me or tell me where I could possibly go to get this info. My gpa was in the military and served during WW2 idk if that helps or not. This just really pisses me off because she has always hated my sisters and myself because my gma did for us more than any of the other grands (this being due to the fact that my father was a jerk off and left my mother to raise 3 girls alone while all my cousins had both parents in the home. Real stupid right)