In my country,they have a day-off a week,13hours working a day
Not in Poland or elsewhere in the European Union. It's usually about 7.5 or 8 hours a day with good breaks (though you can do overtime if it's paid as such) although longer shifts can be possible and you usually get two days off though I think the legal minimum is one. Due to the 48 hour per week rule though, in practice it works out at 2 free days.
The law is applied strictly in Poland, and exploitative employers are dealt with quickly. The Labour Courts are quick and easy. They usually find in the worker's favour.
Don't forget to join a union.
These might be useful to you:
gov.pl/web/family/working-time-setting-and-settlement
en.m.wikipedia.org/wiki/Working_Time_Directive_2003