Support Home About Upstart How can I contact Vantage West Credit Union? How can I contact Vantage West Credit Union? You can reach us by: calling us at (855) 765-4335 Monday- Sunday between 6AM-5PM PST.; sending us an email at vantagewest.support@upstart.com. We'd love to hear from you! Was this article helpful? 0 3 Related Questions: What is Upstart? Upstart is a technology platform that allows you to obtain...…