Brother sold our shop in Pune without informing me, what to do now?

I just found out that my brother sold our jointly owned shop in Pune without informing me. We inherited this property from our father and I assumed he had no right to sell it without my consent. I am shocked and feel betrayed, as I trusted him completely. The sale happened two months ago and I got to know when the new owner contacted me. What legal action can I take to challenge this sale and protect my rights?