Short delivery — refund not credit/invoice loop

When qty is short (e.g. 9/10 screens on GH4130-ANNIKA-40/41), if the client rejects store credit / wait-for-stock and asks for a refund, process the refund via accounts@ with the owning rep. Do not keep re-attaching the tax invoice after the client confirms the invoice is already received — that delays the refund and escalates the client.