I too have had the same problem with a StarTech BEZELWRKIT. StarTech themselves tell me that they do not stock or supply it anymore though pconestopshop advertises it in stock and then says it is on back order. Do what I have done. Give them a warning of seven days then sue with MONEY CLAIM ONLINE. It costs £25 but they have to pay it together with what they owe you. You can add interest as well.
Hubei Shengjie Office Chair Co.