If it isn’t working in your usual browser, perhaps the non-redirect response is cached. Perhaps try an incognito/private window or a different browser.
This is because there is a ? missing in the URL you are redirecting to. Try https://choose.brisbane.qld.au/?utm_campaign=cb-comnothttps://choose.brisbane.qld.au/utm_campaign=cb-com
The redirect is working, as @anon9246926 already demonstrated. The issue here is rather a local one and you are resolving the “wrong” IP address, respectively probably rather a cached earlier one.
Force your resolver to update the address or switch resolver to use the current address. Once you are using the “proper” address, the redirect will be working for you.