Lacking customer service

<p>Good day</p> <p> </p> <p>my sister bought me a coffee machine last year April for my wedding, we were renting at the time and only bought a house now. We then realized now that she bought the wrong coffee machine, we went to the store to exchange the machine as it has never been used and we have the slip and it's still in its packaging and wanted to even exchange it for a more expensive machine but was told it's more than a year, we called the call centre and they said the manager can make that decision but the manager says head office says no, the ladies I store also said they can see the machine has not been used and we don't want the money back</p>