diff --git a/finance/views.py b/finance/views.py
index c0f9505..5d6f2ae 100644
--- a/finance/views.py
+++ b/finance/views.py
@@ -42,24 +42,46 @@ class BillListView(APIView):
                                               or request.user.is_superuser):
             bill = request.JSON.get('bill')
             children = request.JSON.get('children', [])
-            bill_kwarg = dict()
 
             if bill:
-                bill_kwarg['user'] = get_user_model().objects.get(email=bill['user'])
-                bill_kwarg['opener'] = get_user_model().objects.get(email=bill['opener'])
-                bill_kwarg['description'] = bill['description']
-                bill_kwarg['comment'] = bill['comment']
-                bill_kwarg['course_token'] = bill['course_token']
-
-                bill_obj, is_create = Bill.objects.update_or_create(**bill_kwarg)
-                invoices = bill_obj.invoice_set.all()
+                user = get_user_model().objects.get(email=bill['user'])
+                opener = get_user_model().objects.get(email=bill['opener'])
+                description = bill['description']
+                comment = bill['comment']
+                course_token = bill['course_token']
+
+                try:
+                    bill_obj = Bill.objects.get(user=user, course_token=course_token)
+                except Bill.DoesNotExist:
+                    bill_obj = Bill.objects.create(user=user, course_token=course_token)
+
+                bill_obj.opener = opener
+                bill_obj.description = description
+                bill_obj.comment = comment
+                bill_obj.save()
 
                 for i in children:
-                    i['method'] = get_real_name(elem=i['method'], array=Invoice.BILL_METHOD)
-                    i['status'] = get_real_name(elem=i['status'], array=Invoice.BILL_STATUSES)
-                    i['bill'] = bill_obj
-                    i['yandex_pay'] = None
-                    invoice, _is_create = Invoice.objects.update_or_create(**i)
+                    status = get_real_name(elem=i['status'], array=Invoice.BILL_STATUSES)
+                    try:
+                        invoice_id = i['id']
+                    except KeyError:
+                        invoice_id = None
+
+                    try:
+                        if not invoice_id is None:
+                            invoice = Invoice.objects.get(id=i['id'])
+                            if invoice.status == "P" or invoice.status == status:
+                                continue
+                        else:
+                            raise Invoice.DoesNotExist
+
+                    except Invoice.DoesNotExist:
+                        i['method'] = get_real_name(elem=i['method'], array=Invoice.BILL_METHOD)
+                        i['status'] = status
+                        i['bill'] = bill_obj
+                        i['yandex_pay'] = None
+                        invoice = Invoice.objects.create(**i)
+
                     if i['method'] == 'Y' and invoice.yandex_pay is None:
                         yandex_pay = Payment.objects.create(
                             order_amount=i['price'],
@@ -86,10 +108,6 @@ class BillListView(APIView):
 
                     msg.send()
 
-                    invoices = [j for j in invoices if not j.id == invoice.id]
-
-                [i.delete() for i in invoices]
-
                 res = {
                     "bill": BillSerializer(bill_obj).data,
                     "children": [InvoiceSerializer(i).data for i in bill_obj.invoice_set.all()],