Different item retuned on FBA


#1

Morning all , we sell a Lithium battery on FBA , They are all individually numbered and logged when they go to Amazon , a return has come back to Amazon and the box now contains a used CD !
Amazon say as the box has the correct bar code on thats what went out , I have had the same thing happen with an electric trolley , However the trolley that came back was registered 7 years before by the customer , Getting his £600 payment was a satisfying experience !!
Whats the best way to deal with this one , it will not change history but I am loathed to give away a £220 battery .