While Telstra appears to have been of little help to small business owners I have spoken with during the current outage, some banks have been equally unhelpful in restoring access to EFTPOS processing. One bank outright stated that their EFTPOS terminal would not work until Telstra was back on, the retailer was soon up and running thanks to connecting through a 4G dongle and a router that was fit for purpose.
Sometimes having access to good technical advice is more important than short-term better rates.