If you are having issues with your NBN speed, Tangerine Telecom is offering a free 14 days NBN trial (if your NBN speed doesn't improve after switching to Tangerine, you get a full refund).
Plus they are offering $15 per month discount for first 6 months (total $90)
Basic plan (25mbps) is only $44.90 per month with no contract, no sign up fees, no activation charges.
Check your address eligibility here: https://www.tangerinetelecom.com.au/