After more than 5 months since paying the deposit, I still don't have the trailer...Nor the deposit refund

I ordered a mobile kitchen trailer from T.U Trailers Pty Ltd trading as Trailers Unlimited on 11 October 2022. I paid the deposit on 13 October 2022. I was informed the trailer would be delivered in two weeks from that time, which meant mid November 2022. I enquired in December 2022 after their failure to deliver. It is now April 2023, I still don't have the mobile kitchen. I cancelled and requested a refund of my deposit on 24 January 2023.

This is *****ulent. I have learnt the hard way, you buy from these people at your own risk. I have had to report them to the authorities.