Check the content if the content is in a Widget or a Custom Field.
1. Go to Appearance >> Widgets, on the right if the content you want to edit is in a widget there will be a box named Header or Footer.
2. Edit the content and click Save button.
1. Go to Pages then edit the home page, below you will see some tabs name, generally named Header Content or Footer Content.
2. Edit the content and click Update button.
If neither of these options work for you, contact one of our WordPress developers in Melbourne to help you out.