Is there any way?
 

That i could delete the function for people deleting posts, Threads & members?

It's a usergroup permission on whether a user may delete their posts. They should not be able to delete their account though so I'm not sure what you mean there.

Usergroup Manager > select your usergroup > Can Delete Own Posts? > No
same for Can Delete Own Threads? > No

The only way to delete a user is through the AdminCP. (Unless you have some modification installed)

Can i not delete it through cPanel, Like so it wont occur again.

Delete what in cPanel so what won't occur again?

The file?

You want to delete what file? We are talking about options in the Admin CP here, which are things you toggle on or off and then the option is stored in the database.

No, Can i not just delete the /file in cpanel, So i dont have to toggle ect?

There is no file to delete. It's in the database - it isn't a file. You need to do this from the Admin CP.

Hmph, That takes ages :(