I used the email address on the qvcuk home page. Select the 'contact' link and there is an email addresss there. I got an autoreply email then I got another email asking me for some of the details I supplied but at least an answer.
I couldn't even do this so I phoned Customer Services and was told to use [email protected] which I just did . I was tempted to mention the new invoice but in the first instance I will see if Laurenson is right and it is all BS . Thanks everyone for your help .