Vodafone India — Cheating

I am a vodafone customer from kerala when i was on a tour to mysore i made a call and and i finished it when the call report came they asked me to dial a number for knowing about roaming offers when i dialled that number roam 62 offer was activated i was just looking they didnt mention the price of the offer ans its features they just activated an offer that too for a month i am residing in mysore only for 2 days for that i dont need a monthly offer this is cheating i loosed my 62 rs i need refund this is too pity this is a clear case fraud i need this offer to be deactivated and i need my 62 rs back