taking orders when they are out of stock

I ordered Vancouver 4 piece luggage set at home choice 1 st week of June and I made the payment on the 12 of June because it was a cash order only to find out that they are out of stock after I've made the payment .I send them an e-mail with my banking details on the 25 of June saying I want my refund. I send another email again on the 2 of July with my banking details, they called me on the 7 of July I gave them my banking details again. on the 8 of July nosvele one of their consultant called me asks me if I want anything same price with the money they owe me I didn't find anything that I liked I told her I don't want anything I want my money. on the 12 of July Cindy called me she was replying the e-mail I send on the 25 of June I gave her my banking details again, said I will get my money within 4 working days which I didn't get it, on the 17 of July I called lineth answered the call i explained everything to her she said I will get my money on the 20 of July still I didn't get anything I don't know what to do now. someone called me today from home choice he asked if I want to order something I sad no when I was telling him about the money he hanged the phone I didn't get his n