Having waited since the 13th for an update on the Alpha Mask Duo, I emailed QVC again this morning.
I did mention the comments on QVCUK's Facebook regarding someone being sent another mask.
This is the reply I got this evening;
"I am sorry that you have not yet been contacted. We have are currently in the process of writing to all our affected customers advising that we are unfortunately unable supply a second mask. We still feel the item represents extra value for money and has been priced correctly, however as the item was not as advertised we can of course arrange a return for a full refund.
If you would like to return this item for a full refund including the P&P please return with the completed packing slip, if you no longer have the invoice or packaging please enclose a cover note stating your membership number, order number and securely wrap the item"
Not very satisfactory, considering the options others were offered.
I will be sending mine back.