I feel for you. If I understand correct your Canadian or a PR and sponsored your husband?
If he only got his PR recently then it's conditional anyway. They introduced conditional PR for this exact situation and reason, too many people were taking advantage and then running off.
You need to keep communicating with CIC, send as much information as possible to them including the fact that he is already married. Your marriage isn't even valid.
CIC are slow to respond and act but they will, just keep talking with them.
Good luck