Since you only requested a single operation it is extremely likely that the package is simply not installable and a bug report against that package should be filed. The following information may help to resolve the situation:
The following packages have unmet dependencies: exim4-base: Depends: exim4-config (>= 4.30) but it is not going to be installed or exim4-config-2 E: Broken packages Как понимаю необходимо удалить exim4-config но его никак удалить его неполучается