Unfortunately, I believe you.
However, such exploits have yet to be publicly recognized (in general- not just by Apple)
If you are reaching out via Apple Community support you need to understand your audience and your communication style.
Be more specific at what you want to find answers to, not just a frantic post (even if you feel frantic).
As far as reading, your analytics reports I suggest keeping a timeline of events & if you can match any to what you feel is occurring.
Make it a routine of checking your iCloud sync settings. Your ‘allowed while iPhone locked’ settings.
Accessibility settings - thoroughly- very. All of them- every setting- All of them.
Try to eliminate activities, or apps, that seem to trigger, or can trigger, different Assistive Touch responses.
Do you use external keyboards, mouses, etc…? Bluetooth?
Do you use GameCenter? If you do, then don’t. If you don’t use GameCenter just keep checking to make sure you’re not logged in and unknowingly syncing with iCloud.