It's to be hoped you never have anything that needs a replacement, bought my wife some Vivienne Westwood shoes (so not a cheap item) first time they were faulty it took 8 days to get a reply, the site tells you to deal with the issue through the help portal but no facility for replacements, I emailed them, called them and got VW customer care to contact them, their website says email them, you do that you get a response saying it's an unattended email address and no response, so you call it's go straight to hold and says call back press 1 for customer care but every time goes straight to hold you could spent the rest of your life doing this
Second time (2 weeks later) shoes are faulty again, same thing for 3 days except this time I get through on twitter, I get a call saying they will replace the shoes free of charge, amazing given they are faulty, the girl also thinks it's funny to refer to them as my shoes and laughs when she does so, the shoes changed a tiny amount between the first and second pair and went up £38 I had to pay £13 of this, I asked as a gesture of goodwill after all the problems for this to be refunded, Emily said she would check then emailed me to say they would do it but it would make the shoes non returnable, given two faulty pairs and consumers rights I suggested 3 times by email they should re-consider that offer but of course they never replied