WCF service method not being called from ASP.Net - asp.net

Question

I am trying to call a WCF method on page load from ASP.NET using AJAX. However nothing happens when my page loads even if the code is executed. Also I dont get any errors. Below are the code snippets I wrote. Am I missing anything here?
AJAX Code - The service is configured in IIS properly and .svc is browsing without any errors.
<script lang="javascript">
$(document).ready(function () {
$.ajax({
type: "POST",
url: "http://localhost/FinService.svc/GetMessage",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (response) {
var value = JSON.stringify(response);
alert(value);
},
failure: function (response) {
alert(response.d);
}
});
});
</script>
WCF method - interface
namespace Fin.ServiceContracts
{
[ServiceContract]
public partial interface IFinService
{
[OperationContract(Name = "GetMessage")]
[WebInvoke(Method = "POST",BodyStyle = WebMessageBodyStyle.Wrapped,ResponseFormat = WebMessageFormat.Json)]
string GetMessage();
}
}
WCF method implementation
namespace Fin.Service
{
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public partial class FinService : IFinService
{
public string GetMessage()
{
return "hi from wcf";
}
}
}
Web.config
<system.serviceModel>
<bindings>
<webHttpBinding>
<binding name="WebBinding"/>
</webHttpBinding>
</bindings>
<services>
<service behaviorConfiguration="sbehaviour" name="myservice">
<endpoint address="" binding ="WebBinding" contract ="Fin.ServiceContracts.IFinService" behaviorConfiguration="WebHttpBidning_IPublicService"/>
</service>
</services>
<behaviors>
<endpointBehaviors>
<behavior name="WebHttpBidning_IPublicService">
<webHttp/>
</behavior>
</endpointBehaviors>
<serviceBehaviors>
<behavior name="sbehaviour">
<serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="true" />
</behavior>
</behaviors>
</system.serviceModel>