I can't sign into my xbox account

Glad to hear it. For future reference, every time you make a change to your gamertag (email, password, etc) you need to redownload it via the BC menu

Hi! I'm Rostom, an Independent Advisor. I will be glad to help you here.

When did this issue start to occur? Are you able to navigate through your System Settings to perform a factory reset?

Oh, I see. Can you please try to recover your account on this link?

https://account.live.com/acsr

here another problem arose, they can’t restore my account using this link, I went on my PC and answered all the questions correctly, but they tell me that this is not enough

Oh, I see. Please don't leave any blank questions because it can result into an auto fail if there's a missed question.

Привет, я Дерика, независимый консультант, и я обязательно смогу вам помочь.

Не волнуйтесь, мы будем работать над этим вместе. Могу я узнать, какая именно ошибка возникает при попытке входа?

This is the problem that the error is not observed by me, but I go to the site xbox.com still unregistered