We were on Speed Pack 3 and very rarely had a problem with our internet connection! From 1st December we were dropped to Speed Pack 2 and have had nothing but the fantastic Circle of Doom every day, when I spoke to Optus they said to contact NBN which I did, NBN said to contact Optus! Another Circle of Doom. We also received a letter from Optus on the 12th December telling us if we were not happy with the new speed, we could move to another service provider by 14th December! We have had a whole two days to decide! Optus, seriously what are are you doing?
The only problem is if you leave Optus Fixed Wireless NBN for another provider, you cannot go back to Optus as they are apparently not signing up any new customers! So once you leave, if you want to go back you are then a new customer! I have also been told by Optus that they are getting out of Fixed Wireless!
That's news to me. Fixed wireless is probably the dodgiest NBN tech for delivering broadband. It is very susceptible to congestion if to many want too much. While its possible Optus have put it in the 'not worth the agro' column I don't think any large RSP would be game enough to just refuse to service a large chunk of regional users. Perhaps @Ray_YC can confirm?
The not getting back on is possible but not because Optus won't. Its possible the wireless tower you are on is over subscribed and NBNCo won't add more customers until it has been upgraded. But that's a bit of a guess on my part.