I'm trying to partiallysubmit a multi step form with following code. But it does not save current step details, saves only upto the last step. Any help for this please.

CMS Version: 4.8

Contour version: 1.1.12

FormStorage formStorage = new FormStorage();
            //local code
            Form form = formStorage.GetForm(new Guid("d7aca7dc-6f51-48df-85c3-da41dcfc4366"));
            RecordService recordService = new RecordService(form);
            recordService.Open();
            var cookieName = RecordService.GetCookieReference(form);
            HttpCookie myCookie = HttpContext.Current.Request.Cookies[cookieName];
            if (myCookie != null)
            {
                var ss = myCookie.Value;
                var record = recordStorage.GetRecord(new Guid(ss));
                recordService.SaveFormToRecord();
                recordService.NextPage();
                recordStorage.UpdateRecord(record, form);
                recordStorage.UpdateRecordXml(record, form);
                recordService.SaveFormToRecord();
                recordStorage.Dispose();
                recordService.Dispose();
                umbraco.library.RefreshContent();
    }