view/frontend/layout/telesales_payment_cancel.xml

<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="1column" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
    <body>
        <referenceContainer name="content">
            <block class="Affirm\Telesales\Block\Payment\Cancel" name="telesales_payment_cancel" template="Affirm_Telesales::cancel.phtml" />
        </referenceContainer>
    </body>
</page>