Flipkart — Updating contact number

Address:

Thane.

My wife has received a gift card from yougov. She wants to update her new number in your system. When contacting your customer by mail/ bot we get message otp sent to your registered number.
The issue is the registered number is no more with us. How can we update the otp when we don't receive the same.
Would appreciate a call back on my mobile for your guidance.
Sharma Ganti
[protected]