Makro refund nowhere in sight

I bought a fridge, dishwasher, microwave, kettle set and washer dryer from Makro thinking they would all be delivered by 4 October, as promised on their email. Guess what? They delivered the kettle and toaster but I wasn't in so that was returned and I receive my refund. I have tried for weeks to get them to refund me for the fridge, microwave, washer dryer which all amount to nearly R30 000. They keep saying my cancellation failed and they will escalate it. I think they are having a laugh. Please assist me.