Applied for hdfc millennia from number different from aadhar, any problem?

The number registered with aadhaar, is linked to my bank account and I have tata neu rupay with it. Whenever I entered number it showed you have another application pending and to try again later.
I put in my second number and I got millennia ltf (as per online , I'm okay paying annual fee aswell).

Since number is not linked to aadhar, I was unable to complete ekyc, hence opted for biometric verification.

Question:
A. What problem can arise.
B. Will biometric verification be a problem aswell due to number mismatch
C. If it's issued, can I link it to my bank account (I doubt it cuz number mismatch).
D. If issued is it possible to change mobile number of credit card.