Items not in stock and no mention of refund!

I placed an order online with woolies - order number o*** for 3 items on the 5th of May. I then received a mail on the 22nd of May, saying that 2 of the items were not in stock, and that i wont be charged for it, but I've paid already?! They make no mention of how i will be refunded and my mails just go unanswered.