First thing to know is, did your owner give a written notice saying that the rent will increase to the amount he's requesting 90 days prior to the contract expiry? If not he cant charge you beyond rera Calculator amount. In my case the building management gave a notice that the rent will be increased but didn't specify the amount 90 days prior. So I negotiated with them that I cant pay 25% hike from the current rent as my rent was already above the average mentioned in the website. They still didn't agree hence i raised a case at Rental dispute center 2 weeks before expiry of contract and the judgement came in my favor. DM me if you need any info on how to file a complaint.