The thing to do is tell them you want to make a recharge under s75 of the Consumer Credit Act:
https://www.which.co.uk/consumer-rig...t-aZCUb9i8Kwfa
and they will know exactly what you mean. I did this when a furniture company I had bought an expensive armchair from went bust before sending me the goods, and I got my money back pretty much painlessly.
CW Sellors may be tough guys with their customers, but as soon as Visa or Amex are on their balls because they've had to refund the payment you can bet it will be a different story.