No delivery of Power Unit

Bought a Power Unit from them on the 13th of December 2023, it showed 12 stock available! Then I enquired every week about the delivery and they whatapped and emailed me a tracking number which says the unit is still in Cainiao, China. That was their last response and they do not answer the whatapp number or emails now? I want my R4720 plus interest back please, because after 38 days I don't think they will deliver? Please help, I can not afford to be ****med, please! I am an online teacher and need the back-up power to do my job, please it's urgent! Regards, David Pienaar