mount.cifs not mounting to directory

I have been trying to mount a storage box for 2 weeks without any success. I have tried all possible methods from around the web and I have failed.

This is the command I am using:
mount.cifs -o user=username,pass=password //storagebox/backup /mnt
result:
Couldn't chdir to user=username,pass=password: No such file or directory

Notes

• Samba is installed and running
• The directory /mnt exists and I can browse to it
• I am logged in as root and root has permission on /mnt
• I can connect to the storage box with smb
• username and password are correct
• I am using the above command as given to me by the storage box hosting company
• I have tried all possible options that can be added to the mount command

try googling about it, should be simple
http://www.serverlab.ca/tutorials/linux/storage-file-systems-linux/mounting-smb-shares-centos-7/