Hey Roberto. Thanks for reaching out here; a heads up that this is an open forum so if you don’t want anyone seeing your site, you may want to get the username/password out of the comment above. (Of course, as those aren’t backend credentials, they’ll only allow for viewing). Just wanted to make sure you were aware of that 🙂
As to your issue here, the first thing I’d suggest right off the bat would be to go to Events -> Settings and change to a different template under the “Template” tab. The plugin comes with a couple and your theme may have some of it’s own. Try each of the options in there – they’ll all provide a different appearance for the page and one should be full-width calendar (no sidebars).
If that doesn’t work, let me know and we’ll continue to troubleshoot as best we can. Thanks for your patience so far.