Cheated by builder.

Facts posted by you for not constitute any offence cheating so police will not entertain your complaint.Better settle the matter amicably.

You can send a legal notice to the builder if agreement terms violates

Greetings!

If the agreement is in writing, for the violation of the agreement, a case can be filed. but prior to such action, written notice in the format of a letter of demand should be sent to such person. and in the letter, harassment can also be mentioned. 

If the harassment/ torture keeps continuing, a complaint at the nearest police station can be lodged. under Section 294 of Indian Penal Code. 

Section 294 

If a person does an obscene act in public, recites, or utters obscene words to annoy and torture, a person in public, is punishable under the law. The offender would be booked under section 294 of the Indian Penal Code and would be liable for imprisonment up to three years or with a fine or both.

Regards,

Kawmini Liyanage.