amex business gift card 可以 dispute transaction 吗?

usps寄包裹,因为post office的错误导致没送达目的地给我return了。邮费大概100刀,usps总客服和post office互相踢皮球不给退款。用amex business gc付的邮费,看条款好像没办法open dispute,请问有办法拿回这100刀吗?:pray: