Overstock.com Item still not delivered after A MONTH from the order and four calls to Customer Services Internet

I placed an order for multiple products, one of them was not delivered. I contacted Customers Services via Chat . They said that they were going to check with the courier and if the package was not found they were going to send me another one. in 1-4 business days. I contacted them 10 business after, they confirmed that the package was not found and that they were going to send me another one. It's been 32 days since the original order and I'm still waiting. I contacted support three more times and they keep promising a replacement. No new tracking number on the Web site. I'm requesting a refund trough my credit card company, filing an official complaint with BBB and spreading the word.