Oh okay, I only asked because I was wondering why they haven't replied any of your enquiries unless there is a representative. I don't think getting an agent now can do much as they were not included in the initial submission as a representative. I had a friend who tried seeking help from an agent but they refused saying they do not know about his file and hence no grounds to work on it.
Oh and if you the sponsor, has your husband PA tried contacting them with his UCI or APP No using webform or email. Because I remember once ma wife(sponsor) contacted them and they replied saying she is not a representative and hence cannot request or make enquiries on my behalf so indirectly advising that I am the only person eligible to make enquiries on my file. Unless we filled the representative forms to make her eligible to request info.
However, people's cases may vary, if you are in touch with any agent you could definitely give it a try to see the outcome. But first get consultation before engaging them in your process.