What can I do if women is threatening me for false case?

My maternal grandmother has a house on her paternal land but the wife along with her 3 daughters of the deceased brother of my grandmother has been after the land, in collusion with another of my grandmothers brother. On 8 December 2023 they beat up my grandmother and her son(my uncle) when I approached to defend against them, they also hit my scrotum. My grandmother is hospitalized and I and my uncle are under medication. Now they are threatening if we take any legal action against them, they will file false cases against me (sexual assault kind). They are threatening to destroy my career .