Tenant beating me and threatening to kill. Not clearing dues.

My tenant was living in my house since 6 months and he was making my property dirty . They started pet business in my property . I gave them a notice to leave the property , when they chased me with a boti dao and even beaten me . Then they left the house and coming frequently and taking away their belongings . I locked up their room along with their belongings demanding to clear my dues then only I will allow them to take those away . Is that legal as my dues are pending ? Now they filed a complaint against me for not returning their items . I went to police and lodged a case of crpc 107 against them . Now they filed a general diary against me . Today they called me up and agreed to pay dues in cash but i refused and said that I will accept it online only as it serves as a proof . Cash has no proof . They are threatening to write petition in nabanna. What shall I do now??