Owner refuse to register property in buyer's name after purchase

“As mentioned in agreement In case Seller will back out from deal then Seller will return the token amount paid by buyer along with equivalent amount as penalty.”And Seller is verbally agreed to pay Rs. 15,000 per month towards the compensation for the token amount.(this is not mentioned in agreement) The terms being mentioned as per the extension of agreement 53 Lakhs,that the property would be registered within 6 months by paying the balance of 43 Lakhs. It's been about 3 months now and I am willing to get the property registered by paying the balance amount. But the owner is telling that she doesn't want to sell the property, and that she is ready to give back the advance I have paid (10 Lakhs) with the compensated amount (3 Lakhs). She is been telling different stories for the past 2 months. After enquiring with the broker as to why the owner was doing this, I came to know that she has got an offer of Rs. 63,00,000. What are options I have? Please do guide me, I am living in UAE