UniverCell — Mobile internet free for four months

Address:

Visakhapatnam, Andhra Pradesh

I was told by the sales girl named Haritha that if I insert an airtel sim then I will be getting 2GB data free at speed of 3G per month for 4 months. So, I purchased Nokia Lumia 610 on 4th of this month. Aitel has not provided the free service so I contacted Univercell and they say that the service no longer exists.
Its clearly written on the box that free service is applicable.