Account frozen again

My account was frozen month back because I received large sump of money they will need to verify the source of money which took them weeks to do so, and now again it has happened that I received money from the very same source and they still freeze my account and say that they are still investigating which does not make sense to me, I have been suffering over this issue and my debit orders and rent etc are not paid due to this,I am suffering while I have money in my account I even begged them to only withheld the amount I’ve just received now so that they can investigate while I’m able to access some of the money that was in my account but they refused