Poor after-sales support - Still can't exchange a product

Poor after-sales support. There is no telephone number available to talk to a human.

I bought a LG microwave oven from Takealot online. It was an open box item. When it arrived I saw it's not the correct Microwave oven, its a much cheaper model. I followed the return steps. I choose an exchange.

Takelot staff changed my status to refund. Claiming the product isn't available anymore.

But is it: the link allows me to buy another brand new one, just not an open box one.

But a wanted the product which I paid for.

I wanted an exchange.

I can't get anybody from Takealot to assist me.