I cannot verify my account

5 days ago I got an error when trying to access xbox live using my hotmail account.

When i tried to login on my computer I got the message "Someone else might be using your account"

The alternate mail and mobile number are old and I cannot use them to verify my account.

I click the links and fill in the questionaire but as I dont use this account other than on my xbox I am unable to answer anything like

Folders you have created

Recent email subjects

Recent email contacts

I am however able to provide my credit card details used on the account

BUT

All I get is an automated email saying try again.

Please help as I have now been trying to resolve this for 5 days now