If you refuse delivery with the courier, it is still booked with them, so they will get it back to QVC.
When you refuse from the postman, if it does not get back to them, then it is an undelivered item.
Both do entail having to wait for your money back though...sometimes a very long drawn out process.
Sometimes CS is able to cancel the order (sister managed it once with a camera 9 hours after putting the order in).
The bit about having 7 days to cancel is to do with the distance selling 'act'...can't remember the exact words, but you only have to tell them within 7 days of RECEIPT of the goods that you are returning it.
There was something in the Computer Active magazine that I read last week, and was going to post it, but time ran out, and I'm not back home until late tomorrow. I'll find the article and post it then...unless anyone does so first.