Airtel — my airtel application

Address:	Thane, Maharashtra, 401202
Website:	My Airtel app

Yesterday i saw my airtel app and it was showing i get 10gb in 100rs (Surprise offer). I then called customer care, dey said that if it is showing in ur airtel app, den der wud b d offer for u. I thn subscribed it. However i received a one message stating -

"congratulations! Airtel data offer with 1.5 gb 4g/3g [protected]@rs100 has been activated on your number [protected] with effect from 05-sep-2017. To check your data usage, sms datause to 121"

I really don't know what z going on.. Is it some kind of trap for earning money of airtel. As this shouldn't happen, or i think the developers of my airtel app r under training. Now i m requesting airtel to waive off 100rs or provide me the pending gb which was promised in my airtel app.

Attached screenshot is not the one which i have taken, as dat offer is not showing for me now. However datz d one, which was experienced by some one else!!!