Nestaway & Landlord Fraud

I signed a lease with Nestaway in May 2024. In October 2024, my landlord forced me to switch to a direct agreement with him, bypassing Nestaway. I informed Nestaway immediately. The landlord had previously tried to get me to sign a direct contract with him. He then had the property removed from Nestaway and collected rent directly. Nestaway called me for OTPs to finalize the offboarding, which I provided, confirming during the call that the security deposit had been transferred to the landlord. I signed a new agreement with the landlord, which included the security deposit amount. However, due to excessive dust in the Gurgaon location causing health problems for my family, including my 4-year-old daughter, we decided to move. I informed the landlord in December. Initially, he seemed okay, but on the day of our move-out, he imposed a fine of ₹11,000 + ₹1,000, claiming it covered tenant placement fees (which were never mentioned) and court costs for creating the agreement. I agreed to minor wear and tear charges but refused the other fees, as he couldn't provide proof of these supposed expenses. Now, the landlord is refusing to return my security deposit, telling me to get it from Nestaway. Nestaway, however, is claiming I owe them ₹90,484, broken down as: ₹80,584 for early move-out, ₹34,930 for repairs and maintenance, and ₹14,900 in pending dues. I was never informed of these charges. What can I do?