Recover accidently SMS/iMessages

I have "backup to iCloud" turned on and messages are set to use iCloud.

I accidentally deleted a thread of messages from one person.

I immediately turned back up to iCloud off.

It seems to me that because messages synch to iCould and they don't appear to be included in the iCloud backup then I can not recover the messages, even by overwriting my iPhone with the iCloud backup.

It seems ridiculous that Apple does not have the ability to create a snapshot of messages.

It also doesn't seem to have a facility to back up a specific message, a thread of messages or all messages except using screenshots or laboriously selecting each message in a thread and then emailing them to yourself.

I have resorted to using Dr Fone to keep snapshot backups of messages but to do that I need to connect to my PC. It would be wonderful if someone developed an App that would save messages to a cloud service.