[joglynne]

@ Weenie. I suspect that their refund has been actioned manually whilst the order process is automated and whoever you dealt with on the phone didn't cancel the replacement and/or didn't go into the supply system to tidy up.

I had a similar problem problem with Argos when I ordered a microwave oven for a friend. For some reason the on-line order was duplicated/triplicated and I was receiving multiple emails advising delivery. I phoned up and although the extra ovens never got delivered I still got notices regarding their delivery.

In your case I would do as Snoopz says and hang on to any delivery. It could come in handy to use as leverage should your refund not materialise.