diff --git a/app/Http/Controllers/BillplzController.php b/app/Http/Controllers/BillplzController.php
index f26cf5a..443b6d8 100644
--- a/app/Http/Controllers/BillplzController.php
+++ b/app/Http/Controllers/BillplzController.php
@@ -16,16 +16,17 @@ class BillplzController extends Controller
             'KOPKB',
         ];
 
-        $bills = array_map(function($company_code) use($request){
+        $bills = array_reduce($companyMapping, function($carry, $company_code) use($request){
             $billplzService = new BillplzService($company_code);
             $billIdArray = json_decode($request->bill_ids);
             $billIdArray = $billplzService->getBills($billIdArray);
-            return array_filter($billIdArray, function($bill) {
+            $carry[$company_code] = array_filter($billIdArray, function($bill) {
                 return $bill !== []; 
             });
-        }, $companyMapping);
+            return $carry;
+        }, []);
         
-        return array_merge(...$bills);
+        return $bills;
         
         
     }
diff --git a/app/Http/Controllers/BillplzTransactionReviewController.php b/app/Http/Controllers/BillplzTransactionReviewController.php
index 8bc8979..5160b32 100644
--- a/app/Http/Controllers/BillplzTransactionReviewController.php
+++ b/app/Http/Controllers/BillplzTransactionReviewController.php
@@ -18,13 +18,12 @@ class BillplzTransactionReviewController extends Controller
             'KOPKB',
         ];
 
-        $billplzTransactionReview = array_reduce($companyMapping, function($carry, $company_code) use($date){
+        $billplzTransactionReview = array_map(function($company_code) use($date){
             $billplzService = new BillplzService($company_code);
-            $carry[$company_code] = $billplzService->getBillplzTransactionReview($date)->toArray();
-            return $carry;
-        }, []);
+            return $billplzService->getBillplzTransactionReview($date)->toArray();
+        }, $companyMapping);
         
-        return response()->json($billplzTransactionReview, 200);
+        return response()->json(array_merge(...$billplzTransactionReview), 200);
     }
     
     public function show(Request $request)