Dependency Injection - Api Web

Good afternoon,

I'm trying to create dependency injection in Web Api, but I'm not getting it, I get the following error:

  

SimpleInjector.DiagnosticVerificationException     HResult = 0x80131500     Message = The configuration is invalid. The following diagnostic warnings were reported:   - [Lifestyle Mismatch] BracoService (Singleton) depends on Bank (Transient).   - [Lifestyle Mismatch] CabecaService (Singleton) depends on Bank (Transient).   - [Disposable Transient Component] Bank is registered as transient, but implements IDisposable.

Global.asax.cs:

using BecomexTeste.Service;
using SimpleInjector;
using SimpleInjector.Integration.WebApi;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;

namespace BecomexTeste
{
public class WebApiApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();
        GlobalConfiguration.Configure(WebApiConfig.Register);
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);

        var container = new Container();

        container.Options.DefaultScopedLifestyle = new WebApiRequestLifestyle();

        container.Register<IBracoService, BracoService>(Lifestyle.Singleton);
        container.Register<ICabecaService, CabecaService>(Lifestyle.Singleton);

        container.RegisterWebApiControllers(GlobalConfiguration.Configuration);
        container.Verify(); <----- O ERRO ESTÁ AQUI ----->

        GlobalConfiguration.Configuration.DependencyResolver = new SimpleInjectorWebApiDependencyResolver(container);
    }
}
}