Cancellation: Do not display refund notices if not required

src/pretix/presale/templates/pretixpresale/event/order_cancel.html

@@ -15,6 +15,7 @@
         {% endblocktrans %}
         {% trans "This will invalidate all of your tickets." %}
     </p>
+    {% if refund_amount %}
         {% if can_auto_refund %}
             <p>
                 <strong>
@@ -32,6 +33,7 @@
                 {% endblocktrans %}
             </div>
         {% endif %}
+    {% endif %}
 
     <form method="post" action="{% eventurl request.event "presale:event.order.cancel.do" secret=order.secret order=order.code %}" data-asynctask>
         {% csrf_token %}

src/pretix/presale/views/order.py

@@ -583,7 +583,7 @@ class OrderCancel(EventViewMixin, OrderDetailMixin, TemplateView):
     def get_context_data(self, **kwargs):
         ctx = super().get_context_data(**kwargs)
         ctx['order'] = self.order
-        refund_amount = self.order.total - self.order.user_cancel_fee
+        refund_amount = self.order.payment_refund_sum - self.order.user_cancel_fee
         proposals = self.order.propose_auto_refunds(refund_amount)
         ctx['refund_amount'] = refund_amount
         ctx['can_auto_refund'] = sum(proposals.values()) == refund_amount