Prevent my husbands deportation

I am raising money to help with legal fees in order to prevent my partner from being deported for unknown reason. He has been residing in the uk for over 20 years we have 9 children together. He has a history of mental illness. Due to his mental state laps he had gone missing for a few days I've involved the police to find him and now that they have found him all i have been told is that there trying to deport him asap please if you can help with any donation as its a matter of urgency.