diff --git a/src/bot/commands/task.ts b/src/bot/commands/task.ts
index 3011a82..fcde1af 100644
--- a/src/bot/commands/task.ts
+++ b/src/bot/commands/task.ts
@@ -71,7 +71,8 @@ export async function handleTaskCommand(body: string, sender: string, groupId: s
         }
       } else if (action === 'nueva') {
         try {
-          const finalAssignedUser = assignedUser || normalizeUserIdentifier(sender);
+          const senderPhone = normalizeUserIdentifier(sender);
+          const finalAssignedUser = assignedUser || senderPhone;
           const task = createTask(sender, {
             description: cleanDescription,
             assignedTo: finalAssignedUser,
@@ -86,10 +87,14 @@ export async function handleTaskCommand(body: string, sender: string, groupId: s
                   `\nCreada: ${task.createdAt}`
           };
           
+          // Ensure sender is properly formatted
+          const senderPhone = normalizeUserIdentifier(sender);
+          
           // Send confirmation privately to creator
-          sendMessage(sender, message.text);
+          sendMessage(senderPhone, message.text);
+          
           // Also notify assignee if different from creator
-          if (assignedUser && assignedUser !== `@${sender.split('@')[0]}`) {
+          if (assignedUser && assignedUser !== senderPhone) {
             const assigneeMessage = {
               text: `📝 Se te ha asignado una nueva tarea:\n${message.text}`,
               mentions: [assignedUser]
@@ -98,7 +103,12 @@ export async function handleTaskCommand(body: string, sender: string, groupId: s
           }
         } catch (error) {
           console.error('Error creating task:', error);
-          sendMessage(sender, `❌ Error al crear la tarea: ${error.message}`);
+          try {
+            const senderPhone = normalizeUserIdentifier(sender);
+            sendMessage(senderPhone, `❌ Error al crear la tarea: ${error.message}`);
+          } catch (innerError) {
+            console.error('Failed to send error message:', innerError);
+          }
         }
       } else if (action === 'asignar') {
         try {