Indianoil Xtrarewards — complaint regarding non response of indian oil xtra reward for registration of new card.

I have purchased xtra rewards card from indian oil situated at sector 49, chandigarh. They charged rs. 60 from me and i was told to activate the card from my mobile by calling on phone number[protected] or [protected]. I tried calling several times since but 18.05.2018 but no one is answering my call. I am cheated by indian oil company through its authorized agents. Please resolve my issue.