Online order incorrect

I have order a 13 piece Paris bedding. On line they advertised that the curtains are lined. On receiving the order I noticed that the curtains were not the ones advertised and were not lined as per adverti*****t. I phoned the call centre and the lady said that I need to return the whole order for them to correct at my own cost. I told here that why must I pay if the order was not packed correctly. She then stated that the warehouse packs and they are not responsible for the packing, this is understandable. I told here that it was not right that the whole order must be returned and why not just the curtains. This was an debate going on and she then said they would carry the cost of the returning of the whole order. I then stated why cant we just send the curtains back why the whole order as this does not make sense. I also stated that the lined curtains do cost more and I received the unlined curtains that are sheeting material. I was not happy as I paid a lot of money for this order and received the wrong curtains. She then put me on hold to speak to a supervisor and there I was on hold for a very long time and eventually had to put down the phone. No more buying there,