Paytm — Wrong benefit received in Recharge

I had recharged for 3G - Docomo for mobile number [protected] on Sep-17-2015 through Paytm. The recharge amount was Rs. 91 with validity of 28 Days. The recharge was successful with Order No : [protected](Paytm order id). But, I received validity of 10 Days only. I have contacted Docomo regarding the same. They say the Rs 91 recharge has 10 days validity with 400 Mb of data. But, in the screenshots I have taken after recharge which shows Rs 91 recharge with 28 Days validity.