How difficult is banking for you. Previously, before the sanctions in our country, I simply entered the card details, then in the bank’s mobile application on my smartphone I received a confirmation of the purchase and that’s all (it took a couple of seconds). There is no mobile number binding in the account manager)))
I’m pretty sure that your bank does to confirm a payment you want to make - so you should rather ask there to which number the sms are sent and check in your banking account which number is stored there.