Poor quality products and customer service

I bought a Bondsonic fan heater in December and only used it twice the 3rd I tried to use it, it didn't work. It over heats at the back when you switch it on and does not do anything. I called and reported it last month and was told to log a return, but I still have not received any communication regarding the return. I'm still waiting for my refund. Why should I stay with a heater that is not working while I hardly used?