when deleting record from DB the page cannot be rediirected using AJAX

An AJAX response sends all output to the AJAX success callback.

What you need to do is use the "status" property as returned to success to decide what action to take - in your case a redirect via JavaScript.

Assuming you're using JQuery, the JS looks roughly like this...

Code:

success: function(data)
{
    if(data.status == 'success'){
        window.location.replace("http://example.com/users/upload");
    } else {
         //show the error message somewhere
        $(someSelector).text = data.msg;
    }
}

In case it's not clear, remove any redirect calls from the controller method