http://www.dot.gov.in/usefullinks/telecom-regulatory-authority-india

i had taken dongle of reliance co. on 18 August 2015 at that time i had paid plan of 1 year before 18 August 2016 i stopped using that dongle i stopped on 10 august 2016 than also reliance co. send me bill of rs 1136 and also send me 2 times legal notice i had bill of reliance co.