I had this...
but on my mobile.
I received a text saying my order at Argos Cheadle would be available for collection the following day. It came in the same message thread of an Argos order I had made personally so it was clearly coming from the right source but it wasn't my order. Got through to Argos who were very good about it and confirmed it was a real order but the person had mis-entered their mobile number and let me know there would be other texts but to ignore them. They seemed pleased I had thought to check this out and not only were they easy to contact but they did what seemed to be all the right things to check this was not a scammer.
Why do I feel I have now used up all my luck with telephone support?
Biting the hand that feeds IT
