Evicting tenant when no rental agreement

I have a tenant who is residing in my house(West Bengal) since Nov 2019. There was no lease / rental agreement instead it was month-on-mouth lease. Due to my profession I stay far away from my house and the discussion happened between my mother and the tenant only. From last Nov 2020 the tenant neither paying any rent nor paying any electricity bill. Now even they are reluctant to vacate my house. In this regards I would also like to mention here that Jan 2021 my mother expired and by warish I got the property. Though I still could not able to change my mother's name in municipal mutation or electricity connection into my name due to financial problem but recently change the name in Khatian. 1) Do I have the authority to serve notice of eviction to the tenant being the landlord of the property? 2) What steps should i follow? 3) Currently I am paying electricity bill on behalf of them. Will it go against me if I do not pay the bill and electricity board disconnect the connection. Please guide me.