I have found the customer service to be terrible. So...i have resorted to redialling, asking to speak to manager and telling them not only the problem I had originally but also my issue with customer service.
Last time I did this over a £12 pair of fairy lights which were broken. I got a cheque sent to me for £40 made up £20 for the lights (original cost plus postage) and £20 goodwill gesture/apology. CS manager was very upset at bad service and went off to listen to the calls, called me back to apologise again (she could locate them from my number). Had a cheque not a gift card as I said I was not sure I would be using them again!
The time before, I had a broken tv, and was made to go trundling through a tiny loft hatch in a loft in the process of being converted (so a mess) for my guarantee despite being heavily pregnant, even though the tv was their own make, clearly broken, and all I wanted was a refund. I made such a fuss, right there, in store (it was the day before my due date) and then flounced off to get the receipt, produced it, said I disliked being put into the category of possibly 1% of those who are dishonest rather than the 99% of honest people, and got a £50 gift card and a written apology and the tv replaced.
So, yes, they are crap sometimes, BUT if you complain enough/loud enough they will compensate.
Unlike morrisons who sold my friend runner beans with bugs crawling through them, and gave her £2.50 gift card 