Lost all edits

Hi there.
I seem to have lost all edits I made to the theme and front page of my website. I installed the Oasis theme and used the Colibri builder. Colibri proved quite challenging but I managed as well as it would let me. I coud not incorporate a decent contact form, however, because the lay-out turned out completely warped, no matter what I tried. Tried two different form plugins, both the same. Eventually I thought it might be best to add a form with Elementor, which looked somewhat better. But when I switched back to the Colibri builder to continue my work, all of my texts and images were gone. No idea what happened. And at this point, the lay-out is gone too. I seem have no option to go back to a previous version.

Does anyone recognise this and know a solution to salvage my texts? Thanks.

The page I need help with: [log in to see the link]