Property dispute

Dear Sir/Madam I am requesting opionion about property dispute with my family of 3 brothers and one sister. I live in Australia from 2001 and my family lives in India. My father passed away in 2007 and left property for our family. In fathers will, all of us were equal beneficiaries. I went to India 3 years ago as both brothers were fighting to get much pie of the share. When I went there, they already had everything planned and on paper had divided properties amongst themselves leaving no property for me and mother. For formality they asked me if I need anything and at that time in order to refrain from any dispute I said no. The matter resulted in going to police as well. As advised by my mother, I signed the agreement made by both brothers which resulted in them being owner of all the property. Can I lodge case in court now to get hold of my share? Please let me know if you require further information from me to assist me with this query. If you need me to call you, I will call you to seek advise. Appreciate your help. Regards Vicky