An ability to refund a POLi Payments payment from the Magento 2 backend should be disabled because AlphaCommerceHub does not support it

[dmitrii-fediuk]

«POLi (June 2015)» → «Supported transaction types»

API Refunds are not supported by POLi.
Merchants have access to online reports which show the customer bank account details allowing the merchant to process a manual refund.