Wrong tights delivered

I ordered some items online for the first time and chose the option to have the items delivered the next day and paid extra for that, this was Tuesday 4 August 2015. I received one item on Thursday 6 August, this was tight but was the wrong colour. I chose black & white on the online store but I received a blue and black tight. I called to enquire about this and to find out where the item is and I was told someone will get back to me and that the other item is still coming. I received the second item on Friday 7 August. Besides the fact that I got the wrong tights the order also arrived very late and I don't see why there is even a option to have items delivered quicker.<br> To this day no one has gotten back to me about the incorrect tights that where delivered to me. What am I supposed am I supposed to do with this now? This is not what I wanted and I want the tights I ordered online. <br> <br> How am I supposed to continue shopping on your online store if this is the kind of service I'm going to receive?