Idea Cellular — 3g data balance not received

Address:

Ujjain, Madhya Pradesh

I am devasish sharma I receive msg that on calling 121999, i can check best 3g data offer for me. I called on that and listen rs449 recharge will give me 3.5gb 3g data balance with 3months validity. But i receive only 1.275gb 3g data with 3months validity. Because of auto call recording app in my phone, i had complete call recording of the call in which i listen the offer. I want my complete data balance as per offer.