Sorry you haven't heard anything back but it's super important we get you account access. We file Help Desk tickets for issues like this so we should be able to give you an update on it if you haven't gotten one by now. Please reach out to our T-Force folks through the social media links in my badge or on our Contact Us page. They'll be able to look into this issue for you further.
When I try to use "Contact Us" to send message, it takes me to "My T-Mobile Account" which I can't access.
So how exactly do I "reach out to our T-Force folks" to set up a Help Desk ticket, without going through "My T-Mobile Account"?
(With my repeated calls to T-Mo Technical Support, there probably already is a Help Desk ticket, so doing this again likely won't solve anything.)
I suspect this is a massive website problem. I also have a very old "legacy Pay As You Go" account, which is still active. I can't access this account on "My T-Mobile Account" either; I get the exact same error message: "You are not authorized to use this account."
Technical Support did not seem surprised at this, saying it was a "known issue", so it probably affects many T-Mo subscribers. I just wanted to get in touch with other affected subscribers, while I'm waiting for T-Mo to fix what appears to be a massive technical problem on the T-Mo Website.
Sorry you're having trouble. If you have a FB or Twitter account you can click the links in my badge or the links on the Contact Us page I posted. You'll have to scroll down to the Get social section on that page.