Question about Outlook Express

Outlook.com has stopped getting mail from AT&T Yahoo Small Business POP servers.  This has affected me, my wife and many other users in the MS Community.  So, far, I've spent 2 weeks trying to find answers and I'm getting very little real support outside of repetitive, useless questions and very little understanding of the problem from Microsoft support.

1. This problem started for me on July 31st after working flawlessly for 6 months.
2. My Yahoo account is a "paid" account.  MS has already posted that Yahoo free accounts are not intended to work this way.
3. My Yahoo account is "Yahoo Small Business", not "Yahoo Plus".
4. My Yahoo servers are pop.bizmail.yahoo.com (SSL/995) and smtp.bizmail.yahoo.com (SSL/465)
5. This is NOT a login/password problem contrary to the error received at outlook.com | Settings | More mail settings | Your email accounts | Add a send and receive account: "We couldn't sign in to your POP3 server. Please make sure your username and password are correct. "
6. This is NOT a Yahoo problem because:

            - My Outlook client, set up with all the same server information direct to Yahoo, works fine.

            - My Outlook client, set up with the outlook.com EAS account, hasn't gotten mail since July 31st because outlook.com quit getting mail.

            - My Windows 8/Windows Mail program gets mail via IMAP from Yahoo using the same login/password.

            - My Windows 8 phone, using a direct mail account to Yahoo, gets mail just fine.

            - My Windows 8 phone, set up with the outlook.com EAS account, hasn't gotten mail since July 31st because outlook.com quit getting mail.

            - My SurfacePro Mail program, using an account working directly with Yahoo, gets mail just fine.

            - My SurfacePro Outlook client, set up with the outlook.com EAS account, hasn't gotten mail since July 31st because outlook.com quit getting mail.

            - And, of course, logging directly into Yahoo Small Business, access mail just fine.

The only thing that does not work is OULOOK.COM.  And OUTLOOK.COM, with Exchange Active Sync, is responsible for email, contact and calendar synchronization to all my Microsoft devices.  That has now gone away and I'm tolerating duplicate emails, unsync'd contacts and unavailable calendar data.

I've gone through 800-MICROSOFT and was asked to purchase a one-time problem fix, which I did, for $99.  Then they told me that, since its outlook.com, they can't fix it and will refund my money.  They sent me to another support desk and I watched them remotely go through all the basic garbage until (after about an hour) they finally believed what I've printed above.  However, they could not solve the problem and said they'd call back.  I never heard from them again.

I'll gladly pay money guys!  How do I get this fixed?