Dedicated eCommerce Customer Care representatives are available Monday through Friday 7am-10pm ET. General Customer Care is available Monday through Friday 7am-11pm ET and Saturday 8am-5pm ET. For website-related issues call 1-800-753-7970; for all other Customer Care issues, call 1-800-645-7270. The technical team can also be reached via e-mail at customercare@mscdirect.com.