Vodafone India — Charged but no service provided

Address:

Thane, Maharashtra, 401202

I received a offer to recharge my phone with 37 rupees and receive reduced call rates between Vodafone to Vodafone but after recharging there was no reduction in the call rates, I called to the customer service and received a response that the caller is in Mumbai so the charges will be normal STD and offer applies to only Maharashtra and goa callers excluding Mumbai. I just would like to know how fair is that. This must be the case with lot customers. Please take my complaint against the service provider so that it doesn't happen with others.