Hotmail account “it seems like someone else is using your account”

My hotmail account is locked due to suspicious activity and I've been prompted to have an access retrieval code sent to my alternate email. I've been using this email for over 5 years and the alternate email has been locked out due to inactivity. I've filled out multiple questionnaires requesting info to confirm that I am the owner of the account but to no avail. I've spoken to a rep on the phone, on a live chat and have tweeted Microsoft support but all have told me to keep submitting the questionnaire.