Airtel — linking aadhaar number

I am getting repeated messages and phone call to register my mobile phone through biometrics to link it with aadhaar. I have already registered my phone number with my aadhaar card which is clearly mentioned therein. Under the circumstances, why should i go to nearest airtel centre to link my mobile with biometrics? Airtel has been known to provide the mobile numbers to various marketing agencies who frequently intrude our privacy. Under the recent supreme court judgment, right to privacy is my fundamental right. Hence i do not want airtel to register my biometrics for aadhaar link as i apprehend that my privacy may be in peril if i do. Since i have already registered my mobile number under aadhaar which is reflected in my aadhaar card, i do not think airtel can force under the name of government to register my mobile under aadhaar again. Please intervene.