Unfair treatment of customers

I purchased a cordless vacuum via the app on Saturday 10 May, made payment and could see order showed processing. on the Tuesday it showed ready to ship. And then the trouble started. To cut a very long story short, they cancelled my order when they noticed they had the price wrong (item is still available at 4x the price). Not a phone call, email or nothing. Other stores would have honoured the purchase and corrected the price afterwards. And needless to say, no manager wants to talk to me when I call and the poor people dealing with the public cant help, they just escalate the matter, but it seems those escalations just end up in the trash. Makro is not a company that treats their customers fairly!