No reaction from PcLink Computers on product clearly marked and "not working"

On 23 November I received an order Mecer speakers from Pc Link Computers. On opening the packaging I found stickers on the box and a note inside the box stating that the the product was "not working" and was returned by Takealot. I immediately (23 Nov) tried to communicate with them (PcLink). They did not - and still do not - answer their phones. I sent then sent e-mails to their 2 email addresses together with photos showing the notices on and inside the box. I have over the last two weeks repeated my e-mails multiple times. I get no more than a computer generated acknowledgement. Have I been dumped with a product that was marked clearly (by PcLink?) as "not working"? Has PcLink been closed down? Can someone help me on this? In any event, Potential buyer: Be warned!