For cameras in the UK I usually buy from WEX instead, who have excellent customer service and specifically sell camera equipment. I quite like Scan for computer components too. But for general “stuff” or tech, Amazon are so much better than places like Currys, it’s not even funny any more.

I have had issues with Amazon in the past, but if you do have a poor support experience you just need to persevere until you get someone more flexible. Which is somehow still better than most of our other stores here in the UK.