If you’re thinking about something like – Accidentally saved over ankiweb cards ? That was data overwritten in a sync today … not data deleted from an old account months ago. That solution won’t work for you, I’m sorry to say.
Did you sync with another device perhaps, where you might be able to find your collection? Have any backups of your computer (or the Anki profile-location Managing Files - Anki Manual, or your collection) from before you “reset” your computer? Even an old backup is better than nothing. Does “reset” mean wiped the hard-drive, or something less complete? Might you still have Anki data on that computer?