Horrible online service

I ordered a jacket online from Mr price paid for it and everything then 2 days after I received an email to say it's been canceled and I have to wait 7 days for my refund... What nonsense is this? How do you advertise stock online then get notified its out of stock... When I asked the call center operator if they could perhaps check if any stores has the jacket for me because I need it for next weekend I was told no... That I needed to wait 7 days for my money... I can't wait 7 days.. This is the worst terrible service ever I've experienced... How do you advertise something that's not in stock ...?