Unmount gvfs fileserver which does not show up in 'gvfs-mount -l'

I am working on a remote server that runs CentOS 7.4.1708. On this server, I managed to mount a fileserver, which is in the same network, with the following commands that I found somewhere on the internet:

export $(dbus-launch)
gvfs-mount smb://xxx.xxx.xxx.xxx/abc/

Now I was able to access the files at

/run/user/100*/gvfs/smb-share\:server\=xxx.xxx.xxx.xxx/\,share\=abc/

Once I finished moving files etc., I usually unmounted the server:

gvfs-mount -u smb://xxx.xxx.xxx.xxx/abc/

Now the problem is, that **I forgot unmounting and just closed the ssh connection** to the CentOS server. Once I logged in again, I could still access the fileserver at /run/user/100* and that directory still showed me as the owner. However, gvfs-mount -l does not show the fileserver anymore and trying to unmount it results in the following error message

Error finding enclosing mount: Containing mount does not exist

**Edit:** Remounting of the fileserver does not work, the gvfs-mount job does not finish within 10 minutes and seems to do nothing. **How can I unmount the fileserver now?** (I have no sudo rights)