I have an SFTP server setup, whenever a user tries to connect over SFTP they see the directory /home/user but then they can also change directory to /home and even /

How do I stop this so they can only see the current users home directory?

I have this in my sshd\_config which 

```
Subsystem sftp internal-sftp
Match group ftpaccess
    ChrootDirectory /home/sony
    X11Forwarding no
    AllowTcpForwarding no
    ForceCommand internal-sftp

```