Homechoice bad service

I have ordered a 55L microwave from Homechoice, after eventually receiving it , the thing doesn't work, so I called whereas I was told I must post the microwave back?? Then I asked why can the same couriers not collect it again its huge, I mean really do they actually know HOW BIG IS A 55L MICROWAVE, oh at my expense then when its done I must send the receipt once they received it. will it take then 5 days before I get my money back???? REALLY, the ****** thing is so heavy I cannot even pic it up never mind send it via post office????? Then I complained on Facebook only 6 days later did anyone reply and asked for me the send my details, which I did, then a Lisa contacted my and told she arranged for a courier to come and collect it, that was the Monday 26th of Nov, I must wait for their call they will arrange with me, Friday the 30th I asked again when is someone going to contact me, no answer, Monday the 3rd I asked again, when is someone going to contact me, still no answer, today I asked again and still no answer????? SO WHAT AM I SUPPOSE TO DO WITH THIS BIG MICROWAVE THAT DOES NOT WORK, what is wrong with Homechoice really??? You guys phone us non stop for orders but once you place it then that's that, no customer service afterwards???????