IPC section 499 and 500 puts criminal liabilty on the person who is defaming you. you can file criminal complaint against him. However if you are running a buisness you can get civil remedy also such as public appolgy and economical losses or can get criminal remedy and civil remedy both. It depends upon the nature of defamation.you can contact Lead India to know more in details or for the expert solutions, ensuring satisfaction through effective legal counsel and problem-solving.