Hi Warren,
The Australian Consumer Law gives consumers (that is, you and me) the right to ask for a repair, replacement or refund of a faulty product.
The first question is whether your blender's water leak is a major problem or a minor problem.
You can review the definition of a major problem on the
ACCC's website.
A major problem includes:
a. it has a problem that would have stopped someone from buying it if they'd known about it; and
b. it is unsafe.
If the blender is only leaking a few drips of water during operation, it is arguably a minor problem. In contrast, if the blender is leaking most of its water/liquids at any time, it is arguably a major problem.
In my experience, it can be a battle to argue with a retailer about whether something is a major or minor problem. Consumer Affairs Victoria has a great
MyShopRights App that you can use in store to support your argument.
If Big W insists that they can repair the blender in a short time, then it may be best to accept the repair and move on. Alternatively, if they do have replacement stock and it is clearly a major and unsafe water leak, then use your powers of persuasion for a refund. Good luck!