after that you could try to phone yourself or fill-in a PLE (Post Lodgement Enquiry): http://www.immi.gov.au/contacts/forms/gsm/post.htm
hey Iona Horia,
I don't think the PLE will work if you have an agent as I too sent a PLE and got a reply that all correspondance will be done through your agent as he /she is the authorized person to receive any updates.