Xamarin.Forms XAML RelativeLayout can not scroll

Hi guys, i have a piece of code like this
`

    <Frame CornerRadius="6" Padding="0">
        <ScrollView>
            <StackLayout Spacing="5"  BackgroundColor="White" Padding="10" >
                <Label Text="お客様番号はお届けしているお水に貼付されている伝票にてご確認いただけます。" TextColor="Black" FontSize="15"></Label>

                <Label Text="※記載がないお客様は当社カスタマーセンターまでご連絡ください。" TextColor="Black"  FontSize="15"></Label>

                <Image Source="voucher_sp.png"/>

            </StackLayout>
        </ScrollView>
    </Frame>
    <StackLayout>
        <Image Source="close_x_icon.png" HeightRequest="15" WidthRequest="15" VerticalOptions="Start" HorizontalOptions="End" x:Name="CloseIcon"/>
    </StackLayout>

</RelativeLayout>`

and i want to create a UI that looks like this image here.

But it does not works, i'm not sure where did i go wrong. please help me.