Work / Authenticity of offer in Poland (admin / cashier vacancies in shopping malls) [10]

Hi everyone,
I am from India. Recently I have been contacted by an agency in India telling me that there are job openings in poland ( Admin and Cashier vacancies in shopping malls). They are offering upto 3500 zl (net). After reading the posts here, I highly doubt the authenticity of job offer. Since it is clear from the posts that if you dont speak polish it is highly impossible to get a job. Further,

Agency is not giving me the name of my employer till I get the visa citing the reason that i will contact the employer directly without their help.

Do anyone think it is possible for a non european to get a admin job in Shopping malls in poland ?

Kindly do reply quickly.................. It will be a lot of help to me............