I'm not being insensitive or piling on. I just don't want this to ever happen to you again.
'Cut from railing'. They cut your lock? Try the 'two U-lock method'. They cut the railing? That's sucks, but it can happen in any 'common area', particularly one that's out of sight and unvisited for lengthy periods. Get the bike inside - there are ways: indoor racks that lean against the wall, bikes that fold as thin as 15cm, etc. Once you get the bike inside, try the two U-lock method.
There used to be a thread about that somewhere. Couldn't find it searching for it.