Worst online shopping experience

I ordered an item online on Saturday morning expecting delivery within 2-5 working days.I called in on Tuesday and I was told the item hasn't been shipped which was still fine.I logged on to check the order status yesterday and it said "on hold" ,I then sent a Dm on their Facebook page and I was told that I would be refunded there is no stock of the item that I am interested in.What frustrates me is that no one bothered to contact me and when I am asking for a refund I am told I will only get my refund within 10 to 30 days which I believe is Nonsense.R7749 is alot of money for me and if they cannot provide what I am looking for I can get it elsewhere,Infact another company a better item for far less.Had I not contacted them I would still be waiting for delivery to date.I always do online shopping and I have never encountered such.I don't even know what steps to take to get my money back.If there was no stock why did they allow for the sale to go through?When I called on Tuesday why was I not told theres is no stock?Order ***