how to redirect to html page in my web api post method

Question

I want to give web API to the user fro particular time only such as if I give the hosted link of web API to the client then it should be accessed for 15 days only for that, I have Added startDate and EndDate Column in my Registration table whenever the user logged in the date of logged in gets save in database I will define EndDate Manually in database

[HttpPost]
public void PostInsertDate([FromBody]ExpoRegistration ExpoRegistration)
{
//string remoteUrl = "http://localhost:64995/Data.html";
Big5OnlinePortalEntities db = new Big5OnlinePortalEntities();
var date = db.ExpoRegistrations.FirstOrDefault(e => e.UserName == ExpoRegistration.UserName && e.Password == ExpoRegistration.Password);
if (date.StartDate == null)
{
date.StartDate = DateTime.Today.Date;
DateTime edate = date.StartDate.Value.AddDays(15);
date.EndDate = edate;
db.SaveChanges();
Request.CreateResponse(HttpStatusCode.OK, date);
}
else
{
Get();
//Redirect(remoteUrl);
//Request.CreateErrorResponse(HttpStatusCode.NotFound, "Customer not found");
}
if (date.StartDate >= date.EndDate)
{
Request.CreateErrorResponse(HttpStatusCode.NotFound, "Customer not found");
}
else
{
Get();
//Redirect(remoteUrl);
//var response = new HttpResponseMessage(HttpStatusCode.Redirect);
//response.Headers.Location = new Uri("http://localhost:64995/Data.html");
}
}
public HttpResponseMessage Get()
{
var response = Request.CreateResponse(HttpStatusCode.Found);
response.Headers.Location = new Uri("http://localhost:64995/Data.html");
return response;
}
}

In above code, everything is working well. The problem is with redirect of page data.html

 

why it is not redirecting to it 

 

Thanks!!