Update for those interested, lodged feedback and a little over two weeks got the following response. They did try to call me just before they sent the email. I've just taken out the family members details and the details of the person who sent the email.
"Thank you for your email regarding Mrs and Mrs
experience at Adelaide airport last month. I am sorry I have not been able
to respond earlier. I d did try to call you, without success.
Please convey my sincere apologies to Mrs and Mrs for the
offence caused by the level of service you describe having been provided at
our Business Class check-in.
We want all our customers to have an enjoyable experience every time they
travel with us and for our staff to be friendly, respectful, courteous,
helpful and professional. I was very concerned to learn of the comments
made by a staff member and I have let Adelaide airport management know of
your wife’s experience.
Thank you again for taking the time to write. I do hope we will see you and
your family again soon.