I've had some issues trying to return things.
I've just returned something fairly pricey (circa £70). I did the whole Hermes collection thing - they collected from here, gave me a slip and Asos emailed me to say it had been received by Hermes. Then I got a second email from Asos, saying my collection had failed and could I click on a link taking me to Asos customer service to arrange another collection...
I wouldn't mind, except that when I had another issue recently, I couldn't get hold of them to sort it, as their live chat is rarely enabled and they didn't respond to my email. Should have learnt my lesson there really!
Not buying from them again I don't think.