Airtel — Mis-information for payments

Address:

Thane, Maharashtra

Respected Sir/Madam,

My name is Tejal Patil, i was using wireless Internet services of Airtel with mobile number [protected]. I used to connect it to my laptop with their data card.
The data-card was priced Rs. 3000. On top of it, they made me pay extra Rs. 500 in the name of Deposit and FALSELY promised that it'd be fully adjusted against my first 5 monthly bills (Rs. 100 per month).
I'll list my complaints and grievances here on:
1) They didn't make any adjustments in the monthly bills as promised. And the deposit is not yet returned.
2) Upon complaint of pt.1 to the Airtel authorities they simply denied that and stated that there wasn't any such scheme.
3) Now, when I asked them to discontinue the services, they sent me a Legal Notice under Sections 403, 405, 406 and 420 for unpaid bills which I'm ready to pay after deducting the deposit amount.