To be fair the issue I had recently with the incorrect XT shifter being sent was remedied (via refund) very quickly and all dealt with via email.
Even the big boys dont get it right all the time, my daughters Hudl tablet developed a fault and as its still under warranty I decided to take it to a store to sort out a replacement.
Passed round several service desks, had to speak with 3 different depts over the phone to be then told they would arrange a courier to collect and exchange it, I had to challenge this seeing as I was already instore and they had over a dozen sat on the shelf why could I not exchange it for one now , rather than having to wait a week and take time off work to wait for a courier plus the extra inconvenience to me and the expense to them for sending said courier.
They begrudgingly let me exchange there and then, the instore staff were great but the warranty/call centre staff were a shower of sh!t.