A customer was charged twice / got two orders. Can you fix it?

Yes. Double charges come from a retried submit, a slow 3DS return, or a webhook firing twice, creating two orders or two captures for one checkout. We reconcile the gateway ledger against Magento’s sales_payment_transaction records, refund the duplicate, then add idempotency on the place-order and capture calls so it can’t recur. The reconciliation is included in the Bug-Fix Sprint tier.