You can also email for an exchange.
Send the pertinent info: order number, item number, new size, color, whatever to qvceasyreturns@qvc.com.
Ive done this before and it works perfectly every time.
They will respond in a few days and send out your exchange if it is in stock.
Then just pack up the original merchandise and send it back with the label. I never send anything back until I hear back from the exchange person. But if you already have then it shouldn't be a problem.
if you are exchanging there is no cost taken off for the return shipping label.