Vodafone India — Re recharge acceptance fee

My telephone number is[protected]

Yesterday i. E.24th april 2017 through net banking of hdfc i have recharged an amount of rs.342/- after receiving an offer message in my above phone. To my utter surprise i have got a message confirming my transaction and also intimating that an amount of rs.332/- or so was deducted as acceptance fee which may be clarified to me as an amount of rs.10/- was showing as balance.

What is this acceptance fee why should i pay

I want a clarification from your side immediately as i do not want to pay any acceptance fee.