Eviction of shop

Dear sir/ma'am,
i have shop in rural area, i am running my business through this shop from 1993, there is no agreement between me and the landlord because we know each other personally, i was paying rent to him in cash. Unfortunately landlord was died last year and the property is divided between his sons now these day they want me to vacant the shop because they want to reconstruct the building, its seems that his intention is not good he want me to vacate the shop and wants to allot the shop to another one because of prime location of my shop. sir/ma'am my shop is very old and established shop in the market i am confused what shod i do please suggest me.