Amazon.com Services LLC (EIN 82-0544687) is a part of Amazon. There's even a few NLRB unionization cases aimed at an institution of that name by a group of Amazon employees, which would probably have been shut down if they wasn't aimed at the right institution.

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That doesn't mean someone else might not try to use the name, but that is a valid name for a fulfillment division of Amazon. And if you find one of their listings (i.e. https://www.amazon.com/Microsoft-Student-One-time-purchase-Download/dp/B09H7GPR1G/) and click on the store name, it goes to Amazon customer service.