First of all, you should carefully study how the contract-housing sales contract and intermediary contract-is agreed. Have you paid the agency fee? If it doesn't perform its due duties, at most, it doesn't charge or underpays your agency fee. If the seller fails to perform the contract on time, you can propose to terminate the sales contract and ask the other party to pay the corresponding compensation according to the contract.

Only when the above objectives cannot be achieved will litigation be considered. Before that, you should learn some basic legal knowledge about litigation.