Emails today work as receipts. I once had an issue with amazon where I bought a hight value item (relative to my usual buying pattern), and they silently cancel

Emails today work as receipts. I once had an issue with amazon where I bought a hight value item (relative to my usual buying pattern), and they silently cancelled and deleted it. When I contacted support, they first said if it's not in my orders list, then I never ordered it. Then I showed them a screenshot I have taken from my phone previously, with the order number, and they said it was from an account that does not belong to me. It took multiple calls to support over a few hours for them to finally admin that they deleted it. They can fix their privacy issues on their platform, I want my email receipts.