It is best to wait for your notes and reapply. My daughter's visa was refused thrice and we asked for notes and will finally reapply next year as we know the reason for refusal.
5 weeks does not include weekends and public holidays, so I believe it might take another 3-4 days or a week for them to respond. If its an online application you can write to them filling up a form to check the status.
My daughter's student visa was refused thrice. She has done B.Sc in Culinary Arts from India and applied for a writing and communication program with humber university as she wanted to pursue food media as her career path. We applied for CAIPS note and discovered that they were not convinced...