Reliance Gsm — Wrong recharge information provide & get less data

Address:

Ahmedabad, Gujarat

I search on internet about reliance GSM pack for Gujrat state
Link: http://myservices.relianceada.com/ImplWLSStoreOnlineRechargeAction.do

it shows on 57 rupees recharge i will get 400MB data which is valid for 28 days. i made recharge. After that message comes in my mobile shows that valid for only 7 days.

This should not be happened as reliance has very big market in India.