Consumer Redressal

I recharged my mobile with 3G internet plan from airtel online.I took 3G plan of 102 Rs. with 30 days validity mentioned online.After recharging my mobile with this plan i got success in transaction of 102Rs. but a message came from airtel customer saying 103 Rs. recharge done with validity of 30 days. When I activated this plan in my mobile and deactivated after some time(when i am not using the mobile internet i will deactivate it) then a pop-up came saying validity till 26th Dec.Which means they have given me only 20 days validity. I did call the customer care of airtel and told them the same,they told they have changed the plans. So my point is if they have changed the plans,why they have not changed the online rate plan details.They have added few new stuffs in the page but not updated the old rate palns. I have the proofs in the form of messages and as well as i have taken the print of the online airtel recharge page which still says that for 102Rs,300MB,30days validitity.