If Union Bank locked your account for a security reason without telling you, try digital verification through the bank's official methods first. Many banks now let you prove who you are through secure online forms, in-app prompts, or SMS codes.
Once you check recent activities and make sure there's no fraud, this can often unlock the account from afar.
If the app still won't let you in, call Union Bank's authorized customer service hotline, email them, or use live chat to ask for a "account reactivation due to false security flag."
Ask them to start remote KYC or video verification if it's available in your area. This way, you can get your account activated again without having to go to a store.
If support doesn't respond, you can take your case to the next level by sending an official written complaint through Xolvie. This will help you connect with other people and get help.