FIX: Check if invoice exists before sending, if exists then save

Send correct UF amount if date in future

app/src/Service/Venta/MediosPago/Toku/Subscription.php

@@ -70,7 +70,7 @@ class Subscription extends AbstractEndPoint
         return compact('existingSubscriptions', 'missingVentas');
     }
 
-    protected function save(array $data): bool
+    public function save(array $data): bool
     {
         return $this->doSave($this->subscriptionRepsitory, $data);
     }