Upvote:0
The Schengen visa system, like many other visa systems, is supposed to let genuine tourists and business travelers in and to keep illegal immigrants out. The note said
the intention to leave the territory of member states cannot be ascertained
That means they think you might want to immigrate, and it is up to your application to answer their doubts.
This is much more important than a hotel booking, or having enough money in your bank account. I fear that unless you get this problem solved, an appeal or another application won't help.