BestDuplicatorBd-Lg-5T 5-Target 24X SATA DVD Duplicator with Built-In LG Burner (1 to 5) for PC (Windows)

I have had this product for less than 2 months . One of the drives was not copying. When I started copying continuously after about 30 min the duplicator started freezing at various stages. Very disappointed after continuing correspondence back and forth with the seller ( asking me to try out various actions including opening the cover checking cables etc) I have a got a product which is not fit for purpose. How do I get a refund?

Had to replace all drives after poor performance and many failed burns. Significant power issue suggesting capacitor is the root of the problem. Also getting bad master copy warning when the disc is fine (works fine in identical unit).Overall a bad purchase causing me several headaches and little help from supplier