Bad service - Perfect dealz

I have placed an order online for seat covers. The website specified the colour black, however I received Khaki. I have phoned to try to exchange the product. The person answering the phone does not know what to do - if I ask to speak to the manager I was cut off. I phoned a second time and this person claims it is my fault as I should have specified the colour - there were no such option- None of my emails have been answered to this point either