Agent/Broker asking for paying brokerage on contract renewal for the same flat in Mumbai

We had signed contract for 11 months a year back and which is ended in last month Oct-2019, so we (Tenant and Owner) mutually agreed upon renewing the contract for another 11 months, and Owner called up broker/agent (who helped us for finding this flat last year and already charged us 2 months brokerage fees) to complete paper work for contract renewal. Upon making contract we paid half amount to agreement fees to broker already who prepare papers and finger print authentication and Aadhar verification. Now broker calls us and asking for brokerage fees again for renewing the contract wherein I (tenant) not getting beneficial from broker's end on renewal contract. He kept on sending threat messages and force to give him 1 month rent as brokerage fees for renewal contract. I just lost my peace of mind and get terrified by his calls and messages. What should I do to not giving him brokerage fees again on renewal of contract? Please help me with legal suggestion or solution to come out from this mental mental torture.