Airtel — bared my service

Address:

Chennai, Tamil Nadu

dear sir;
my self anil jaiswal my mobile number is-[protected]
sir i m a college student i taken a airtel sim card on my college id because i dont have any other identity proof.when i taken that sim they started my services but after 2 month they bared my servicer that time there was more than 500rs after that i went to airtel service center but i was unable to get any right information they told that your sim is rejected and u cant get your balance and same number again. pls do somthing for me i realy want my balance again and i want to teach a lesson to airtel.pls take reaction this sir.