WhatsApp, which has over 200 million users in India, will provide support through e-mails as well as a toll-free number.
"We will provide 24-hour customer support. Payments users can contact the support team via e-mail and a toll-free number (when the service is rolled out in India)," a WhatsApp spokesperson told PTI.
The spokesperson added that the support will be available in English as well as three Indian languages -- Hindi, Marathi and Gujarati.
However, the official declined to comment on the launch dates and other details.
While WhatsApp is yet to announce the official date of launch of its UPI-based payments service, industry watchers expect an announcement to come in the next few weeks.
Almost one million people are "testing" WhatsApp's payments service in India, which is the largest base for the Facebook-owned company that has over 1.5 billion users globally. WhatsApp payment service, which rivals the likes of Paytm, has been in beta testing in India over the last few months.
The spokesperson said WhatsApp has worked closely with National Payments Corporation of India (NPCI), bank partners, and the Indian government on the details of how its service works.
Under the updated terms, WhatsApp states that it will not provide refunds or facilitate chargebacks as once a user submits a payment, it is final.
"WhatsApp is not liable for unauthorised transactions. We assume no responsibility for the underlying transaction of funds, or the actions or identity of any transfer recipient or sender," it adds.
The spokesperson explained that while users can connect with WhatsApp for queries related to the payments offering, they would have to reach out to their banks for any dispute resolution.