Resuming U-Verse Internet service

I've been a loyal AT&T customer since 1990 and for many, many years have been a bundled customer with Direct TV, Mobility, and Internet. In late march/early early April, I received a marketing email from AT&T about switching to Internet Air. Given it was the same monthly charge I decided to make the switch. Since then, our house has been without internet service for at least 30 days. Internet Air did not work even though I tried 3 different devices which were sent by AT&T (all have been returned). I have been trying to resume my U-verse Internet service for weeks now and have had live conversations with at least 12 representatives and/or supervisors (literally across the globe) all trying to get my service resumed. I've had at least 4 tech appointments scheduled for resuming U-verse Internet and for reasons no one has been able to pinpoint...they were cancelled by AT&T though I was never informed. I even had a technician in my house a few weeks back to resume my service only to be told that while he was at my house mysteriously my order was cancelled and he could not resume my service.

This morning I received an email form AT&T stating I have a tech appointment for tomorrow and when I called customer service to verify that they told me it was cancelled and said I had a fraud alert on my account. Then they told me to go to a retail store in my city and show them my id to resolve the fraud alert. I went and shared the story but the store had no idea what to do and did not see any fraud alerts on my account.

I truly have been gracious in all my interactions, have been on hold for hours, and still without service. Can you help me get someone at a senior level who can get my service resumed?

Could somebody please help me!