Objection of the gifted property

I am an unmarraid woman ,i am staying with my 80 years old mother in my parental house which is build by my father and my fathe was passed away on july'2020.we are 2 siblings ,my elder sister was passed away 16 years ago,she has two daughter well established.my elder brother have on son . we have 3 storied bulding in a prime location and my father was gifted his property to my brother(1 st floor) and to me (ground floor)and leave a will of rest 2nd and additional portion to my mother. now after demise om my father i suit ane probate case which is still pending. my elder brother is no sell/lease his portion(1 st floor) inspite of our objection and me and my mother is insecured in this stage.actually my brother wants to sell the whole property and pressurised us for last 30 years. but some how he could no do thid. in the mean time he purchase more than 4-5 property in different places within west bengal.he didnoy take any responsibilities to his parents as well as house. noe after my father's demise he is desparate to sell the whole ar his portion to any one and quit this ancient property with some ill motive. sir, i want to know how to resit him and give him a lesson for his duties and resposibilities so tat i and my 80 years old mother stay in our place sucurly and peacefully. waiting for your advice.i did'nt want to loose my fathers property which was build by their imotions.