I can sympathise with the frustration of trying to RMA an item with a company who seems determined to ignore you.
I've been trying to get in contact with Hazro to return my 30" 2560*1600 screen for over six weeks now. No reply to webnotes. No reply to emails. No answer on their phone line. They don't even have an address listed with companies house (they don't even appear). Very frustrating to just be completely ignored, especially considering it would cost me over £1000 to replace the screen with an equivalent item.
... if by any chance anybody knows how to get in contact with Hazro then I'd love to hear about it! (anyone from OcUK still have contact? Gibbo?).
I think in such circumstances, you should go to the retailer.