I'm in a similar boat too. Given the Public holiday I've been told mine should arrive in the post by Friday.
I got my permit approved in August but for some unknown reason they messaged me my work permit not my study permit.. semester has begun and I have until Monday to receive the documents...
Got my study permit accepted. Checked my messages as prompted and they sent me the work permit not the study. School has started and I'm chasing down officers to urgently send message me a temporary document to show my college