Procedure in case neighbours putting false allegations of theft

This is Vinay. I am residing in a rented house with my mom. And a family with two daughters is residing in same house on rent. Our portions are built side by side. Yesterday they said that they lost one of their gold chains and they are misunderstanding us. They did not told us about this, but they told to the owners that we stole that chain. Seriously, I can't even think about steal something. And they said that they told this story to a preist and they are saying that some old women stole the chain. They are thinking that old women is my mom( they did not say this to us but to owners ). And they are saying that the priest is coming to our house in two days with some mantra rice to ask us to eat them, so that if we stole that chain, something happens to us. So my question can I file case against this preist and the family? Please reply me with a solution..