Change phone number to buy minecraft

Well, it turns out that I tried to buy minecraft but at the time of making the purchase it told me that a code would be sent to the phone number but a number that is not the current one appears, I change the number from the microsoft account but the same thing continues to appear and I can't change the number from the xbox account because I can't find where to do it. Could you tell me what to do to solve that problem?

:)