Builders Warehouse is a ****

I ordered an item online, they ran out of stock but I had already paid and instead of notifying me of this builders remained silent after 14 days I queried my order and found that they ran out of stock etc. I then queried the refund because obviously if the system picks up that stock has run out then refunds should be automatically done and if not then immediately manually processed... It's been 21 days and my money is just gone. No communication unless I initiate it and no clear indication of when I will get my money back.