Hello @TeodoraHristov ...
I wonder if you are using the Free For Teachers (FFT) version of Canvas? I just checked my own account in the FFT version, and I also see that orange "Canvas Support' button in the lower right corner. This is using a software integration called "Impact" (formerly "EesySoft"). Also, those schools that have paid Canvas accounts may not have "Impact" integrated into their Canvas environments...as this is a paid integration.
I found this thread from a couple months ago: Remove the orange help button. - Instructure Community.
I'm not sure if any of this will be helpful to you at all, but I thought I'd share what I know.
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