Use the virtual assistant which will and should get you to a representative.
If you've already exhausted this support channel with no avail, I can think of a few suggestions but you haven't stated version of Acrobat and operating system. So the following guidelines are a generic troubleshooting approach:
Go online to adobe.com and sign in with your AdibeID. Go to Manage Account, and find the section that lists in which devices you have the Acrobat activated on. Identify the device that you're currently using Acrobat and remove other devices. Just leave Acrobat activated with the computer device that you are using currently.
Apply latest update
If that doesn't work Click on Help, then Repair Installation
If that doesn't resolve the issue, use the Adobe Acrobat/Readr Cleanup and Repair tool. It will identify if any old traces of an older installation of Acrobat needs to be removed. Then proceed to Download and reinstall your product.