UOB Personal Internet Banking Customer Service UOB Personal Internet Banking has an online Help system to support our web-based banking site. In addition, our own customer service officers are available to assist you. To contact UOB Personal Internet Banking via electronic mail: Send your message to UOB Personal Internet Banking Customer Service at helpme@uobgroup.com. To contact UOB Personal Internet Banking via telephone: Dial 1800 222 2121. Our customer service officers are on duty 24 hours a day, 7 days a week.