Adhaar Verification Unsuccessful on FamPay

I have been facing a problem with Aadhaar verification for the last 7 days. Whenever I try to link my Aadhaar with another mobile number, the process fails and the screen shows the message “Your Aadhaar verification failed.” Because of this error, I am unable to complete the linking with the other number and I do not understand what exactly is wrong or how to fix it. I would like to receive clear guidance on why this Aadhaar verification is failing and what exact steps I should take so that I can successfully link my Aadhaar with the new mobile number.