Friendly lady at the reception. Problems with PIN code based access that they change during your stay, and don’t inform about the new code so you can not get in during unmanned hours of the reception (which is all the time almost). Could not call number provided because of non-mobile roaming blocking the only option to get help.
If implementing a PIN based access system, it must work so the code can not be changed until all current guests have been CONFIRMED to have been informed.
They should be paying me money back for this clumsy experience.