Rent agreement expired, tenant continued to stay and pay rent. left without 30 days notice.

I'm the landlord of a rented flat in a society in Sohna, Haryana. Our rented out house agreement expired on 17th May 2026. The tenant continued to pay rent due on 18th May and 18th June. On 08th July the tenant informed that he is vacating the flat and left on 12th July. Now he is demanding refund of the one month security amount of Rs. 14500 and also demanding refund of rent from 12th July to 17th July. The last rent paid including maintenance charges was Rs. 17460. The rent agreement has a clause to serve 30 days notice before vacating the flat. Is the tenant justified in asking for the refund of the Rs. 14500 security and rent for the unoccupied period? What will be amount payable by me to the tenant if any ?