Hello @Xixzik,
I'm sorry recovering your progress has been such a frustrating endeavor. I do see that you're currently in contact with our Support teams.
Someone should be in contact with you soon, but I can try to better explain what's happened in the meantime.
When a console account is unlinked from a Ubisoft account, progress and content like what you're missing stay tied to the Ubisoft account that was linked at the time. So, if you're using a different Ubisoft account, you wouldn't have access to your progress. It does look like they're working towards getting you properly sorted out but feel free to let me know if you have any other questions or need anything.