After sending Legal notice to vacate the shop premises to tenant for personal use tenant told he will file a harassment case on

I send a legal notice to my tenant to vacate my shop premises for personal use and pay the arear because he is not paying the rent to me as i inducted him orally in 2015 and initially he was paying but since Jan 2021 he continue deferred till today in collusion with my cousin brother who is receiving monthly rent and have made agreement without my consent for rent without informing me and now he is denying me, the property is gifted by my 2nd grand father to me along with my cousin brother by means of registered will deed (will is not probated) as my 2nd grandfather has not his own child and now after sending legal notice to vacate and to pay the arear, my tenant told me that he will file a harassment case on me because he has made agreement with my cousin brother and doing business and disregards me. Ground of harassment on legal notice to vacate the shop premises and for paying the rent arear is valid..? what may be the thread for me if I will file a eviction suit against the Tenant.