Trai — sending sms to dnd registered mobile

Please find the attachment attached. I had received a promotional like sms in to my dnd registered mobile number. Idea claim that they are not responsible for the message i received because i had opted for it. But i never filled a form like attached. Also the name. Dob & signature is wrong over there. Some one has done it. I send many mails to the email id i mentioned in the form & they never responded back. I assume idea people has done this. I dont know about it correctly. However whenever i called idea or they called me they just want to close the issue somehow without getting any harm to them. Thus the reason i think they had created such a fake form. Kind request to take necessary action against those people who is misusing the number & sign without the knowledge of the person. My mobile number is mentioned in the attachment.