Nobroker — Fraud committed

Entered into an agreement for taking a flat on rent through NoBroker. Was asked to provide my ID proof (Aadhar & PAN Card) and pay Rs. 10k as advance deposit on 8 Oct 21. Owner is NRI. Did not provide any ID proof, NoBroker did not insist, but closed the deal. Owner never disclosed that he does not have POA in blood relative's name. From 8 to 20 Oct Owner did not provide even one ID proof for himself despite several reminders. Kept changing the draft agreement, not putting any Aadhar card nor bank details in the rental agreement. On 20 Oct he adds Mother's name, does not mention she is authorised POA but mentions she is the sole owner of the flat & renting it out to me. On the building name plate Owner's name is clearly mentioned not Mother. He sent PAN card for his mother & says that will send bank details in a day or two. Over phone Owner says if there is any issue, he will be questioned for not providing POA, it is not tenant's problem!! Doubting the veracity and by the way he was dragging the issue, I backed out and asked for my deposit. Owner now refuses and does not entertain my mails or calls. NoBroker is refusing to provide an email ID for registering a complaint nor taking any action. On 22 Oct Owner got in touch with NoBroker (with same person who showed us the flat) and asked to find another tenant as we have backed off without giving any proper reason. I understand from this NoBroker personnel that Owner's flat is vacant past 8 months and tenants have been backing off at the last minute. Looks like NR has found a neat way to rake in money from unsuspecting tenants and NoBroker supporting him as he is an NRI. Please let me know how can I take action against NoBroker & the Owner and recover my deposit advance paid in good faith.