Last updated on December 18th, 2019 at 06:14 amHow to make a Complaint to Betterment Call the Betterment complaints line on (646) 600-8263 between Monday-Friday: 9:00 AM-6:00 PM ET (Phone & Email) Saturday-Sunday: 11:00 AM-6:00 PM ET (Email Only) to seek a resolution. If this is not effective, then you can try contacting the company through