Hi yrsotrendy,
Thanks for posting in Apple Support Communities.
Since your devices aren't responding to turning off and deleting messages in iCloud, restart them all and try disabling using the button. If it continues, turn off Messages in iCloud from Message app.
1. In the Messages app on your Mac, choose Messages > Settings, then click iMessage.
2. Click Settings, then deselect Enable Messages in iCloud.
3. Choose one of the following:
*Disable All: Turns off Messages in iCloud on all your devices. Messages are no longer stored in iCloud and are instead stored on each device.
*Disable This Device: Turns off Messages in iCloud on your Mac only. Messages on your Mac are no longer stored in iCloud; on any other device where Messages in iCloud is turned on, messages continue to be stored in iCloud.
These steps can be found in Access your messages on all your Apple devices.
Regards.