Inherited Royalty Interest - Little background info

i guess i should mention we got an offer from an oil co. back in april to lease the property that went unnoticed for several months, i called the company they called back but didnt really say much then i never heard from them again , then i called the oil registry where my father is registered and they told me that land had been sold years and years ago, but my granny was drawing royalties on that particular property a long time after it was supposidly sold besides she didnt sell all of it only some plus like i said i have other family with property that are connected to all over the place. there is a lot of property my family was not sure about because of all the unfair ways they where treated, a lot of it considered abandoned i believe, or threatened to leave it alone. but im here to say im a different generation and i intend to get it straightened out put back in our families hands, sorry if thats sounds rude or impossible to accomplish to anyone. i must be headed in the right direction because im being a little bit bullied by some, not saying its by you all either but there going through a lot of trouble to do it. i will answer any questions you all have for me if i can, please continue doing the same , i so thank you for the guidance.