well, moderators of a forum have to moderate the forum and are not personal supporters 
We have some topics where users lost the settings, achievements “in-game” ( not steam ). You can check for that existing topics if you use the forums search-function. I’am not sure whether the achievements can come back. It is stored somewhere on the servers. May be you can contact the support directly.
For the logbock, input-profiles, etc. we described often in forum how users can create a local backup, in special easy for Steam users. But whether that bring back the achievements, I fear not.
Example, which is also relavant for your topic ( users also disuss the achievement )
Personal opinion: lots of us not have that in focus. As view of simmers, are achievements good for nothing. But of course might users unhappy, if that happens and it should not happen.