Security breach

I have reason to believe that my account with including all the Apple devices that I have in my account has been compromised. I saw in my Mac all my devices which I did not put in myself. And in which all devices can be controlled. This I did not do. Someone else did this and not me to my surprise. Aside from this I discovered online I saw all my files which was uploaded and of course not done by me. Another is that there are some documents that are in my file folder that I also did not upload. With these few reasons it is obvious there has been some kind of security breach. I demand Apple to further investigate this urgent problem and issue I am facing and demand an explanation on this matter immediately.

I have been using Apple since iPhone 3 came out and own almost all the iPhones from the beginning up to today. This has never happened in the past.

I am very very disappointed. I demand an explanation on what’s happening.