Find the address, toll free number and complaint form of NPCI, the organization behind UPI and other payment systems. For BHIM app queries, call 1800-120-1740. Alternatively, you can call on the UPI customer care number - You can reach out to the UPI helpline number at 18001201740 for any questions or issues. This toll-free number is available 24x7 to assist you. If you have made a wrong UPI transaction or facing any kind of failed payment issues, you can easily register a complaint through the UPI complaint number or through the NPCI website and get your issue resolved. This guide explains: Official UPI complaint number . How to register a wrong UPI transaction complaint online? How to track online complaint status with NPCI. Wrong UPI Transaction Complaint Number The official NPCI UPI complaint number is 1800-120-1740. This number is available 24x7 ... Find out how to contact NPCI or your bank for UPI related issues, such as failed transactions, fraud, or technical errors. Learn the benefits of UPI , the steps to file a complaint, and the information to provide.