Perhaps someone could get in touch with woolworths to figure out a fix or a plan to fix then update us accordingly? Going off their website and their response to this, it sounds like they are unaware they need to update their app.
The Trolley Tracker app is accesses via the Woolworths website (www.woolworths.com.au) by clicking on the Trolley Tracker link and entering their phone number. A message will then be sent to the phone to complete the installation.