Shopify complaint: Chargeback

I received a notification from you that a customer had requested a chargeback due to not receiving the items i sent
this was a false claim i provided the tracking number the screenshot of the payment and the customers details on the hermes app
i supplied a photo from the delivery uploaded by hermes as proof of delivery
the customer phoned to say that she had only received one pair of shoes
but the packaging is shown untampered with there were 2 pairs of shoes in this one package
i wrap in security tape for this reason and none has been disturbed
i believe this to be a fraudulent chargeback
i have now lost 2 pairs of shoes and the cost of the retail price
i emailed the customer as she said she had received one pair so i asked her to return that pair
neither have been returned so she now has 2 pairs of expensive shoes and the money back
to be honest i am disgusted that small businesses are treated this way even though the evidence is clear that the customer lied saying they hadn’t received the shoes