Union Bank Of India — No otp on my register mobile Number

Address:

New Delhi, Delhi, 110067

Sir as My telephonic conversation with customer care Executive for otp on my register mobile Number. She replied wait ur otp will be generated in evening this rude behaviour by customer care Executive will not be tolerated.when ever I book tickets online through my credit card it get blocked and shows authentication code have been blocked by union bank of india its vulnerable if authorised card holder have to call customer care Executive every time. If it's happened every time what is the need of carring credit card. Kindly do needful help .