how can i cancel power of attorney

I got married in 2002 and divorced through mutual consent in 2010. I have a daughter aged 8 yrs who stays with me. He pays us alimony. In 2005, my ex-husband and me bought a property in Pune, through bank loan for 20 yrs. He pays the loan EMI through our joint account. The property is registered in both of us names. In 2008, we both gave power of attorney to my ex-father-in-law for carrying out all builder, tax, maintainance, renovation, renting-out etc. related transactions as we were not staying in Pune where the property is located. In 2011 when we got divorced, our lawyer told me that I will continue to be 50% owner of that property. In 2013, he got remarried and recently shifted to that house. I am feared that he might have transferred the property on second wife's name seeking father-in-law's help to use power of attorney. My questions are: A) How to find out the present owners of that property? B) If I am still one of the owners then I want to put a stay order on that power of attorney. POA was registered in Bangalore. What are the steps for that?