How weird. Maybe they are trying to get you to come to a ceratin address
with a bunch of camera gear so they can rob you? Who knows this does sound
very strange.

Yes, in my line of business we regularly get people claiming to be customer
who are not.

The two reasons they do this are:

1. To try and access data/information we have belonging to a real customer
whose identity they don;t know.
2. They wish to try and embroil us in a contractual dispute or obtain a
refund.

Its usually #2
How it works is they create hell claiming they bought something from us when
they did not, in the hope that we will either give them it fre eor send them
some money (we might do this if we thought maybe we had made an error and
they might actually have ordered - giving the benefit of the doubt).
If they approach enough businesses they might actually make some cash at
this.

There is a #3 (modified #2)where someone does order something but its not
what they claim to have ordered and they try to get a refund on the larger
value item, or they set a lawyer on you for an out  of court settlement.

Also a #4 (another modified #2) where they screen scrape our ordering system
to order something we don't supply. We refund them, but they claim we have a
contract with us and the lawyers move in.

In your case its probably a straightforward #2

Gordon