delivered the wrong printhead and say its a " non-refundable" item?

I bought a printhead for my printer, advertised for that specific printer and it does not fit. If I looks at the invoice it looks like Takealot send me the wrong product. I have lodge a complaint and everyday a get a 1 liner question from their customer department ( so far 4 different people) not want to commit and not want to refund the product ( R 1000) because it is a "non-refundable" product. I see that Takealot has over 20 000 bad reviews , clearly they are not interested in customer care and just want to collect the money.