... he saw the warning message too late and deposit button isn't still disabled ....
Actually, they added warning message after I've created support request about this issue.
If they did after that ticket about the issue then their service becomes worst even more. They are not doing their job or service well because its not really appropriate that they would impose things after an incident or issue do happen which isn't really right at all.If they would have a maintenance they would really announce it to public before doing such maintenance to avoid problems and seeing now on the situation they are doing the opposite thing.