So, this incident happened about three months ago. When I tried to log into my Gamertag, it gave me a warning saying that my Windows Live ID was not valid. It gave me two options: Associate my gamertag with a different Windows Live ID, or to play offline. When I selected associate my gamertag with a different Windows Live ID, I got an error at the end. Please, help, I've called Xbox Support and posted on the forums several times. I've already paid sixty dollars for Xbox Live Gold. I've already lost three months of it, and that's already a fourth of what I've paid for.
Additional detail: this happened the day after I paid for the Gold Membership.