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If you purchased Minecraft: Java & Bedrock Edition for PC, the purchase should include both Java and Bedrock on the same Microsoft account. Seeing only Bedrock does not necessarily mean you were scammed. First, make sure you're signed in to the Minecraft Launcher, Microsoft Store, and Xbox app with the same Microsoft account used for the purchase, and check whether the purchase appears in your Microsoft Order History.
If Java Edition still does not appear, contact Minecraft Support and provide your proof of purchase so they can review the entitlement on your account.
If you want a refund, submit a refund request through Microsoft's digital refund process. Refunds are reviewed case by case and are not guaranteed.