I just tried another phone number to cancel Trading Planet orders, which seems to have worked!

+44 203 139 9104

I spoke to a very polite girl - Sandra - who asked for my order no. (I never received one) so then took my name, found the order and confirmed it had ALREADY been cancelled and gave me confirmation numbers.
However - when I had used the other phone no (+44 203 139 9027) to try to cancel 2 days ago, I got someone with very poor English who hung up before I could identify myself. So that is NOT how it got cancelled.
Yesterday I wrote an email to all the contacts people on this board have referred to outling the situation and noting that I had contacted my Bank and the authorities in case of a dispute at a later date. Some bounced back, but someone must have actioned the cancellation. (I have cancelled my card just in case).
I hope this helps someone else, I was worried sick!