Never buy at Homechoice they send wrong orders

i use to enjoy shopping online until I decided to purchase at Homechoice, the first order I placed did not have a problem but when I placed another order last year in November I received the wrong item with the right invoice I reported the matter to Homechoice the very next day and they responded via email stating that the correct item will be delivered to me and that their courier will collect the wrong item,ever since I have been receiving phone calls from their call centre claiming that I owe Homechoice,how is this possible?no person in their right mind will pay for something they did not order & I told the person who called me that as soon as I receive the correct order I will pay,the next day I got another phone call & the person used vulgar words stating that I must go to the post office & return the order at my expense,which is something I will not do due to the email I received and it was a mistake from Homechoice,all I want is for Homechoice to collect their item as they stated and to stop calling me because I do not owe them,this is the worst customer service ever experienced and a display of incompetence