This happens more than you may think , i have had two since CHRISTMAS were the seller has sent me a different coin.
I also purchased two from a major coin auction not long ago, paid my invoice to be told a couple of hours later i couldnt have them and my money refunded 😂.
I believe they are nearly all caused by busy bodies telling sellers what they have who probably already have one.
This one the seller was probably told ? as otherwise why would he just swap one coin that was the only one worth anything.One i bought the seller just said he used a stock picture and sent me one similar and the same year. The other a farthing he said he had mixed the two pictures up of both sides., which wasnt correct as the coin that arrived was nothing like the one pictured.
I know longer expect to receive any that were not attributed untill they arrive, sad but as long as people keep telling sellers it will continue.