There was and error downloading 'https://$metadata'. The request failed with http status 403: Forbidden - XAMARIN WEB REFERENCE WITH HTTPS - web-services

Question

I managed to create a web service with self signed SSL through IIS. It's settings at first are set to Client Certificate to none and none required SSL. It is accessible by that time threw web browser and mobile web reference.
Web Browser
Xamarin Web Reference
But when I set the SSL settings to required, it is now forbidden in both. What am I missing in settings for SSL Configuration?
SSL Settings Thru IIS
Web Browser Forbidden Access
Xamarin Web Reference Forbidden Access
WebConfig
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<connectionStrings>
<add name="constring" providerName="System.Data.SqlClient" connectionString="Data Source = source;Initial Catalog = dbname; User ID = user; Password = pw" />
</connectionStrings>
<appSettings>
<add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
</appSettings>
<system.web>
<compilation targetFramework="4.5" />
</system.web>
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding maxReceivedMessageSize="10485760" name="SecureHttpBinding">
<readerQuotas maxStringContentLength="10485760"></readerQuotas>
<security mode="Transport">
<transport clientCredentialType="None"></transport>
</security>
</binding>
</basicHttpBinding>
</bindings>
<behaviors>
<serviceBehaviors>
<behavior>
<!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
<!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="true" />
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true" />
</system.webServer>
</configuration>

Answer 1

To access web service via HTTPS in web browser, I followed this link for creating temporary client certificate but I changed the step #5 to this command
makecert -sk MyKeyName -iv RootCaClientTest.pvk -n "CN=tempClientcert" -ic RootCaClientTest.cer -sr localmachine -ss my -sky exchange -pe
I changed the currentuser to localmachine and signature to exchange so that it will be in personal certificate store. When you access the site again, it will ask for client certificate and you can choose it to proceed.
For the main problem to access the service in visual studio xamarin via web reference (which is forbidden somehow).
I found this link to solve the forbidden problem. You can see the second post of (c)MarkoOkram for the solution.
"I am solved problem by saving web browser .wsdl and .xsd files on file system, change reference in those files to matching files. Than i succesfully add reference in visual studio to that file system .wsdl file." -(c) MarkoOkram
I downloaded the file WSDL and XSDs written in WSDL then retarget the filepath to their respective directories and it's done.
update: I also tried to import singleWSDL and it works without editing for xsd's