How to escape from political mental harasment from local real estate persons for making me anger and fear ?

i am innocent and straight forward talking person. some persons from back gound are trying to get all the information about my family personal financial career and other details. informing me through the third parties. since they are unknown to me i could not fight with them eventhough i know that they are direct enemies. since there is no physaical evidence i dont have any clue regarding the matters of the negotiation. doubt actually making mind confusion and tenson. is any one can understand this situation. please give me correct practical guidance. i took lic agncy. there also they r trying maximum to get details from the customers how do i do business. please help...........