Landlord Harassment — Owner took advance but rented out flat to someone else

Address:

7 Hills Apartment, Kokapet, Hyderabad

I paid an advance of Rs.10, 000 to rent a flat in 7 Hilss Apartment, Kokapet, Hyderabad. However, at last moment, landlord rented out the flat to someone else without informing me. Also, didn't return the advance amount yet and is nit picking up my call or replying to emssages. Request you to kindly help.