Ugg, that sucks! Yes, I can think of no other solution except starting over… Wix might be able to do something but if you already tried what they suggested than you’re probably not in luck. If you do end up starting over, try using the design save feature to make your job easier! https://support.wix.com/en/article/wix-editor-saving-and-reusing-customized-elements-my-designs
Good luck!!