Sears, Sears KMart, Sears Home Delivery Did not refund money after defective product was picked up. Florida

I bought a refrigerator from Sears that arrived defective. The installation crewbleft it there band drove off. I called customer service for help and they told me it was defective and to arrange a replacement. After being sent to four or five different call centers where no one spoke English adequately, I finally arranged a pickup and went to Lowe's and bought a new refrigerator. After calling customer service it took a week to arrange the refund and although they picked up the refrigerator we still have not received our refund. This was 6 weeks ago! Every time we call customer service, we are told they will contact us but never do. We are still out almost $700. I will never shop at Sears again but I want my money!