Seems cheapest month to month pay in advance plan around at that speed. Their higher speed is still better value than others.
Choose the billing option:
PAY IN ADVANCE
PIA: Receive a discounted monthly cost when you pay in advance. You’ll be charged 2 months prepayment on your first bill from the date of activation (connection date).
Your second bill will be due 1 month from the date of activation and continue monthly from your connection date.
Date of activation 14 Nov 2019
First bill: Due 14 Nov 2019. Service covered from 14 Nov- 13 Dec 2019 (first month) AND 14 Dec- 13 Jan 2020.
Second bill: Due 14 December 2019. Service covered from 14 Jan- 13 Feb 2020.
Third bill: Due 14 January. Service covered from 14 Feb- 13 March 2020.
All payments are non refundable.
Critical Information Summary https://www.flipconnect.com.au/home/pdf-doc/NBNCIS040220.pdf