EDIT
Seems that I found a solution (I hope) out of nowhere.
I don’t know if it works in every web browser but it worked for me with Firefox.
DO NOT ATTEMPT TO LOG IN
Here’s what you have to do:
- You need to open a private browsing page (incognito or whatever)
- Go to battle.net then scroll down to the end and click on Contact Us
- On this page choose Customer Support
- Close the pop-up asking for your info and then click on Account
- Click on ''I would rather categorize the issue
- Choose ‘‘Not listed here’’ this is very important or else the system will ask you to log in
- Again, click on the blue Contact Us button
- Fill out the form as needed and press the Submit button and voilà
It may take a few seconds to a few minutes until it submits but it works
I have the confirmation email and all that jazz
ORIGINAL POST:
I’m trying to remove my authenticator to reactivate it on my new phone. The problem I am facing is that I do not have access to my old phone and as a bonus the phone number on file does not exist anymore.
I’ve done everything possible via support pages to resolve an issue with Authenticator and phone number problems. I’ve tried many times to create a web ticket but the submit button is just going around and around without end, even if I refresh the page 1000 times. 
Looking at other similar posts on the forums makes me kinda happy that I’m not currently gaming on any other games except D4. I would be waaayyy more enraged if I was paying a subscription and this happened.
Come on Blizzard, get your act together.