Life / Fail to send mails to o2.pl or tlen.pl [4]

Hi all!
I'm writing from Italy and I don't speak polish...

My office and our websites can't send mails to o2.pl or tlen.pl mailboxes. The mails return back with a error. I can't contact o2.pl or tlen.pl Technical assistance because I can't find any way to contact them on their portal www[dot]o2.pl , because I don't know polish and translating the pages in english I can't find anything too...

Can you gently help me to find a way to contact the Technical assistance of o2.pl or tlen.pl?

Many, many, many thanks for your help.

Greetings from Italy!
Walter.