Hello. My name is Michael. I can help you with your question.
If you know what email account you are using to log into your console with, then you can do whatever maintenance you have to do to the account through the web at xbox.com.
If the problem you are having is something different. Please let me know along with whatever specific information you can give about the problem you are having, what you are trying to do when you experience it, and what exact error messages result. That way I can give you more specific information.