This was revealed in a 'Notice to our valued Customers' published in today's daily newspapers.
ZB Bank systems maintenance and upgrade
We wish to advise our valued customers that we are going to be carrying out a systems maintenance and upgrade exercise from 12 February to 15 February 2019 designed to improve your banking experience.
We regret to advise that service disruption may be experienced on our online, ZIMSWITCH and cards platform. For any assistance kindly contact us on 0772 560 117 or 0732 560 117 or through our social media platforms. You may also visit your nearest ZB Bank branch. We sincerely apologize for any inconveniences caused.