Dowry case before Marriage

A guy who works with me and belong to same caste, approached me for marriage, we both now have been together for 3 years, but he kept on delaying the meeting between families for one reason or other. This year, in feb, he invited me and my family to his home town to talk with his family for marriage alliance, where they asked for dowry in a round about way, i.e. by saying aap apni beti ko itna to doge hi, and iska man h ye car lene ka etc. When i came to know about it, i sent a message to him stating that i don't feel comfortable with their demand, he asked me to leave it to parents. Now, they are cancelling the wedding stating that I am not good enough. They have broken me emotionally, i am continuously being tortured mentally and emotionally. They asked my parents to perform a pooja in their home town only, we spent money on that too. I don't have any proof of their demand, there was no ceremony other than the pooja which was asked to be performed by them. I feel helpless. They have done this with some other girls as well. I don't understand their reason but i want them to stop hurting girls just because they can.