It's good that this CCK matter is brought up, I didn't hear it either before. They won't see me as a customer in the future by any chance, thanks.
also you can still call "charge-back" even if the item is delivered to you, in case if the item is not as described as on the advert and if it's aslo below the specs advertised.
When the company does not accept return of the good and pay the the full amount as refund, you can ask yout Credit card company to make a charge-back, because the item was substandard or not delivered or fault, etc.
They'll make a charge-back, it's the beauty of buying something with credit card.
Also, from my experience (I won't name the company) but I had a very bad experience with an onlin eretailer when I was buying a PC last year.
Distant Selling rules:
That's the thing that I learned at that time and saved me a lot.
Got me a FREE PC even.

Whatever they tell you, when you buy something online
they have to accept it to be returned at the least in 14 days time. If they don't, so you
start a "charge-back" from your credit card company. Get your money back, then:
Remember: You don't have to pay for the return postage if the item is too bulky, big.
You tell the retailer that they should
1-either send you a prepaid packaging or
2- hey should collect it themselves.
KEEP COPIES OF ALL LETTERS. If they fail to collect the item within (about, reasonable time)
one month, then
you don't have to keep it safe at your premises. You need to warn them them you are getting rid of the item.
Wait another week, then, either throw it away or donate, or keep.

They failed to collect the PC in good time,
and I got myself legally a free PC last year. Though it was not the model (they sent a lower one) that I wanted, they got arrogant but I got advice from Citizen Advice bureau on Distant Selling Rights/regulations, and I won.
Keep it in mind, we should practice our rights.