I'm in a similar situation. From what I could find the easiest way to resolve the issue is to report the original transaction ID [1], if you still have access to it.

They list the instructions for PayPal:

> The PayPal transaction ID is a seventeen-character alphanumeric code: 1AB23456C7890123D

> To locate this transaction ID, log into your PayPal account and find the ID in your transaction history. If you no longer have access to your PayPal account, or if you made a purchase that doesn’t appear in your transaction history, you must contact PayPal to request the ID.

[1] https://help.minecraft.net/hc/en-us/articles/360029977371-Wh...