Toll free Number(s):
1800 267 2425 (To block card/unauthorized transaction)
1800 266 2400 (Grievance Redressal 10am-6pm Mon-Sat)
All India Number(s):
1860 210 2484 (24*7 Customer care-Credit Cards/ Citibanking/ Suvidha/ Loans*)
70655 52484 (Missed call no.- To get registered for WhatsApp banking)
International Numbers:
+91 22 4955 2484 (For calling from outside of India)