Oh this is bad. Did you sign any sale agreement with that lady?
If you did than what you can do is contact her and tell her the whole situation if she refuses than you can take legal action if you have signed the sale agreement.
If you have not signed the agreement call the lady and ask her that you need to sign the sale agreement to get it transfered or any other bahana to get this agreement signed and than you may go forward.
Sale agreement is on Stamp paper.