i recieved the secret no. PIN for citi bank maruti auto card. but did not recieve the card. don't know where to complain. the phone numbers of citi bank to be contacted in case the card is not recieved are not responding. what to do and whom to contact???

I received call few days back saying I am pre-approved customer to entitle the Maruti Auto Card and after explaining the benefits of this card I thought to go for it and customer representative (I didn't note down the name but the call was from Gurgaon) took all the confidential information and said I will be receiving card in next 15 days. Instead I received an email saying we are regret to inform you that you haven't been approved for this card!!! I feel cheated as customer representative is saying its pre-approved and later on I get an email its not approved!!! Did anyone also came across such incidence? Shall I go ahead and take appropriate legal action to prevent confidential information which I have provided to them? Any input will be appreciated.