I can't deactivate devices as they dont exist and it says I've reached my limit for Adobe Acrobat

I only have one device.  Support had me uninstall and reinstall, that didn’t work.  There are no devices listed in my account (I have a legacy version of Adobe Acrobat that is not a subscripton).  They then told me to come to this community and “an expert would help me fix it.”  Can anyone help?