Vodafone recharge offer fraud

I had done recharge on my Vodafone mobile no: 8412064005
From Vodafone official site http://m.vodafone.in/rechargeNow/

The recharge benefits are shown as below

↓ Rs.449 Bonus Card
MRP (Rs) : 449
Recharge / Bonus Card : Bonus Card
Talktime (Rs) : 0.00
Benefit : 25% Extra Data: 2GB + 512 MB Free!

But
Actually I got 2GB.
What about 512MB.??????

Help asap

-ashish
24/07/2014