Zando "non-reponsive"

I ordered a pair of sneakers from Zando. The following week I received an email informing me that my size is out of stock and I would receive store credit for the amount concerned. After keeping an eye on the site for about 2 weeks, I decided to ask for my money back instead of store credit so that I can go in store and buy the shoes I want. I sent the email on the 19th of June. I didn't receive any reply, so I queried the status of my request again on the 27th of June. Yet again, I received no correspondence from them. It is now the 2nd of July, so I decided to give them a call. I was placed on hold for a consultant, but hung up after 4 minutes of waiting. I want to be refunded since I did not return the item, it was out of stock when they happily took my money. I refuse to settle for store credit and spend my money on an item I don't really want simply because I was given no other choice.