post https://api.helloextend.com/orders//cancel
This endpoint allows for the cancellation of an order using the Extend Order ID. An order may need to be canceled if it was accidentally created or if there are major updates that are required to the order that are not currently supported by canceling and adding individual order line items.
An order cancellation will result in a cancellation attempt for all associated order line items. Please note, order line items may fail to be canceled if there is logic that would prevent the cancellation of the order line item. Even if at least one order line item fails to be canceled, the overall order status will be updated to canceled.