Parryman22 Said:
"Someone has been accessing my device account and password and apps! I have downloaded software apps,set up screen time,but they are still accessing my iPhone and account,apps ext nothing is working!!!!! How do I stop them???????"
-------
What makes you suspect this?:
If concerned, perform the following....
Three Things to Do:
A. Deauthorize All Option:
Try Deauthorize All. You can only Deauthorize All items once every 365 days. So, you may have to wait up to a year before you can perform this. Go Here: Authorize or Deauthorize your Computer for iTunes Store purchases - Apple Support
also...
B. Modify your Credentials:
Having so much suspicion, consider modifying your credentials, ASAP, starting with a new password.
also...
C. Verify the Devices:
Verify that the devices assigned to your iCloud are your devices: Check your Apple ID Device List to See where you're Signed in - Apple Support