HP Gas Customer Care Number HP Gas Toll FreeBankBazaarSBI City Wise 24x7 Credit Card Customer Care Number. You can call SBI’s city wise 24x7 credit card customer care number, prefix your city STD code and dial 39 02 02 02 to talk to your city’s SBI executives. Keep the below details ready before calling the customer care number or toll free numbers: Your 16 digit card number; Card expiry date