Dear Sir,
It is both criminal trespass and civil trespass. You may take both actions. Immediately you may file suit for injunction and also file a criminal complaint with police.
447. Punishment for criminal trespass
Whoever commits criminal trespass shall be punished with imprisonment of either description for a term which may extend to three months, with fine or which may extend to five hundred rupees, or with both.
Sections 441 to 462 of the IPC deal with the offence of criminal trespass and its aggravated forms. Trespass is generally a civil wrong for which the defendant can sue for damages but when this trespass is committed with a criminal intention, it is treated as an offence and made punishable under the IPC.
Section 441. Criminal trespass.—Whoever enters into or upon property in the possession of another with intent to commit an offence or to intimidate, insult or annoy any person in possession of such property, or having lawfully entered into or upon such property, unlawfully remains there with intent thereby to intimidate, insult or annoy any such person, or with intent to commit an offence, is said to commit “criminal trespass”.
Section 441 has two parts. The first part is regarding entry into property in the possession of someone else with the intention to commit some offence or to intimidate, insult or annoy that person. The second part refers to the remaining in the property unlawfully, after entering into it lawfully, with the intention of committing an offence or insulting,