Shocking Serice and unable to supply

I placed an order for a turbo and paid for the item in full I was promised delivery of the item end of November By mid December I was told that they did not receive my order and offered me a refund, I accepted the offer on the refund as I am unable to wait another month plus for the next shipment to arrive I had then purchesed another Turbo from a European supplier and now Turbodirect SA refuse to refund me even though they are unable to honor their supply commitment