How do i contact mercantile customer service? Our Locations Call Mercantile at 800.453.8700 Customer Service Hours Monday - Friday 8:00am - 6:00pm Saturday 9:00am - 1:00pm Branch hours and availability vary by location.How to contact tamilnad mercantile bank? Tamilnad Mercantile Bank Limited. 269/2-4, Avvai Shanmugham Salai, Royapettah, Chennai, Tamilnadu, India. Zip : 600 014. Phone : +91 (44) 2813 1028 / 2813 1029. Email : [email protected]. How do i reset my mercantile bank account password? Go to one of the Mercantile Bank branches or call the branch and receive a password and ID code. You must replace the initial password you received within 30 days. How to access your mercantile@internet account? Click the Login to My Accounts button. Enter your ID number, ID code and password.What is the mercantileinternet website? The mercantile@internet website lets you perform actions and receive information about your account without any limitations of time or place. The website is secure and lets mercantile@internet subscribers surf with confidence and peace of mind.