Fraud agent

Hi, my friend & me recently had purchased property in navi Mumbai through a property agents. During our purchase the total cost was for me as well as for my friend bit high, we were actually trying to get our first home. Hence, were looking all possible things to save some amount in. Before we finalise the deal, we went through many agents for the same property. And finally we had idea to save money. Which is basically, since the agent with whom we were deal was a channel partner to builder he had been getting 2% commission on our purchase. We spoke may agents, amongs few were ready to pack back 1% commission to us. Since we had good rapo with first dealer we tough let's talk to agent and let's check weather he would be able to give us that or. After all discussions he agreed to pay back 1%. But after final deal & property registration he calls and tells us that he will not pay us anything. As we did bad to him. This all we have as call recording. We had managed the final payment very badly taken money from local lenders on high interest to pay builder. Now it's high for us to manage remain founds. Pls advise what to tickle this legally.