As a stop gap, OP, you might choose to opt for wireless broadband from, say, Skinny.
I do feel the OP has been seriously patient with their request which by all accounts is a fairly simple request (as opposed to a transfer or move). Saying there are staffing shortages is a bit of a cop out 1) Covid has been a thing for 3 years now and so have staffing shortages & 2) 2degrees aren’t hiring for any provisioning roles - so it’s a moot point anyway. Even when I worked there (briefly) in 2017, there was automation for almost all order types. Likely OPs fell into a manual queue somewhere.
Tangentially when I disconnected my broadband with 2degrees - maybe a year ago - the billing stopped, but the connection kept working in a pending disconnect state. Suggests that their provisioning & billing systems have been in disarray for some time now. Add this up across a few hundred customers and it’s not exactly a small amount of money to be losing in wholesale fees each month.