Thats because they are part of BRE Bank(owned by German Commerzbank) aiming mostly at online "services".
Forwarded my emails with mBank to:
simon.steiner@commerzbank.com,
ali.bicak@commerzbank.de,
martin.kurz@commerzbank.com,
marion.denner@commerzbank.com,
dennis.bartel@commerzbank.com,
michael.machauer@commerzbank.com,
gunnar.meyer@commerzbank.com,
constanze.kuschel@commerzbank.com,
richard.lips@commerzbank.com,
nilshendrik.happich@commerzbank.com,
kathrin.wetzel@commerzbank.com,
karsten.swoboda@commerzbank.com,
melanie.loriz@commerzbank.com,
monika.arens@commerzbank.com,
ines.hennig@commerzbank.com,
bettina.storck@commerzbank.com,
silke.lerch@commerzbank.com,
martin.halusa@commerzbank.com,
kirsten.boeddeker@commerzbank.com,
bernd.reh@commerzbank.com,
thomas.kleyboldt@commerzbank.com,
jutta.wellmann@commerzbank.com,
renate.christ@commerzbank.com,
margarita.thiel@commerzbank.com,
t.bonk@commerzbank.com,
sandra.fohlmeister@commerzbank.com,
tim.seifert@commerzbank.com,
claire.tappenden@commerzbank.com,
us.media.relations@commerzbank.com,
pressestelle@commerzbank.com 
mBank has not replied to my emails in the last 6 days.
EDIT:
I also asked for help in the Polski forum:
https://bitcointalk.org/index.php?topic=756560.new#new