I have attempted to recreate the series of events.
- created a folder /share
- created a folder /Archive
- ran ln -s /share/Archive /Archive (received permissions issue)
- ran sudo ln -s /share/Archive /Archive
This, however does not link /Archive to a non existant /share/Archive.
It links /Archive/Archive to a non existant /share/Archive
You can remove by sudo rm /Archive/Archive
Always be careful with rm commands especially when using sudo!
If this is not the case for you, then I can only sympathise and agree that you would need to restore (if you have a backup)