When You end up at a job which you don't like, the first thing you must do is start searching some where else. If for a long time this does not help, let alone, see you must be missing something. Applying jobs through websites and newspapers is fine but that should be least priority.
I believe, you should try to contact your previous employer, and create a link other than your job with him. If he is sincere, either he will ask you to come back or he might just refer you somewhere else. Secondly, join networking sites. And if money is not a big matter, then start your ACCA or at least an ACMA. An accounts job is not a truely finance professional. To be a finance professional, get a professional degree, create passion inside you and success will follow.