How can we get our uncle to pay his dues for using our share of the property?

I am seeking advice on my current issue regarding my estate that I inherited. My father passed away after my grandfather had deeded his property to my father and my uncle. When my father died, me and my brother inherited his portion of the property. My grandfather died and the property is split between my uncle (50% ownership) and us (50%). My uncle has been running the fruit stand which is located on the property and has been in operation since 1958. He refuses to pay me and my brother rent for our half of the property being used or half of the proceeds that are being sold off the property either. We had a cease and desist order placed in effect by a previous attorney and they have continued to come on the property and sell produce from time to time during peak season. Law enforcement is not upholding the order that was placed in effect. My question is what can be done for them for these actions legally?