Bought a couch had a child 8 years old the back fe...

Bought a couch had a child 8 years old the back fell off the couch after 4 days causing injury to my child
They offered a $40 partial refund to keep item who wants a couch with no back they then refused refund because not in original box (another accc guideline breach) then refused me to take it back to them as it wasn t store policy of accepting 3rd party products for refunds. Here we are almost 4 weeks later and no refund and no new couch with no resolution in sight