"This account does not have an Outlook Web App mailbox"

Six or seven hours later, I tried logging in again and it worked. Apparently, my account had been "upgraded" to an Outlook account or something (I'm still really confused about what happened). I did not give anyone permission or request this upgrade, first of all.

So, it let me sign in and I see that not only have I been "upgraded", but my entire inbox has been cleared. Four years worth of emails are completely gone. Now, two days later, I've noticed that I'm not receiving any emails. Usually I get around 25-75 emails per day, but I have not gotten a single one since this "upgrade". Yesterday, I sent myself an email from my gmail account and the email still has not come through, proving that they aren't coming through.

So as you can see, I'm having a lot of problems.

Is there anyway to get my old email account back?

Is there anyway to get my old emails back?

Is there anyway to fix my account so I will receive new emails?
Please help asap.