charged more then MRP from paytm

Company Name: paytm

I have met with an fraudulent transaction with debit card fraud. the fraudster purchased the mobile phone from paytm. with the help of legal proceedings i have got that mobile. when I got the mobile there was MRP Mentioned on the box was 26800 but paytm debited the amount rs 35775. when i asked this from paytm they did not reply for the same. please do the needful to recover my extra charged amount.
TXN ID WAS 2343815842 DATED 21/07/2015.