myhongkong dhgate.com sent poor qualerty goods and wont take back tsuen wan china

myhongkong motorcycle body kit that was of very poor qualerty dhgate promised a garrete refund but failed to do this they paid seller ,they wanted me to post back the goods out of my own pocket .i found this unfair as if you are sent sub standard goods its down to seller to post back dhgate were un helpfull dispite thre promise of garentte refund poliycy. inow have a kit that is fit for the bin. inow have to claim of my credit card holder ,iwill never use dhgate again,and to other buyers be aware as this is a con.