Wasnt refunded for my delivery

Bought a "3 Second Water Heater" from Takealot , which exploded 3 seconds after turning it on . The thing comes with a shower rose , however , the 3 seconds they refer to , is not :ready after 3 seconds , no its ONLY 3 SECONDS OF WATER. Not sure how it would work , as the water comes out BOILING!!And not just water , but steam , thats how hot it gets , and thats why it exploded . My complain , is that they just refund the product , not the R50 delivery that I had to pay . Nonsense Service