Here’s a solution that doesn’t involve editing any code - you can use # in a URL to indicate that the content is on the same page.
You can link your announcement bar to this url: https://wondercalls.com.au/#shopify-section-template–20523784175890__57507b68-02ec-4496-8050-582f73707f80
Hope that helps! For future reference, have a read up on using section ID’s in URLs - it’s a huge time saver.