So if you cannot study in Oxford or such a worldwide known university, the best option is to study in some of the best university you can.
I can assure you that any half-competent HR will know that Poland is not known for the strength of their English-language university programmes. Likewise, any admissions officer dealing with postgrad entries will know that English language programmes in the CEE aren't known for their academic quality. The first question I would ask would be - "why would someone choose to study full time in Poland rather than in their own country?" and the answer is very, very obvious.
Any international company will also probably have an office in Poland, and a simple e-mail to check will soon reveal that the course is worthless.
who perfectly knows two languages plus some knowledge of a third language.
I think you're rather missing the point that international employers are looking for people that attended credible universities on credible programmes. The vast majority of English language programmes (because they're designed for non-EU students that pay $$$) in Poland are simply not credible. Employers know more or less what is and what isn't credible - it doesn't take a genius to work out that Polish universities are massively underfunded and hence these English language programmes exist solely as a path into the EU for non-EU citizens. Poland is also attractive for them as the financial requirements are ridiculously low.
(Although both are good universities in their countries, I recommend that one if you want to study in Spain)
But the question remains why someone would skip going to a good university in Spain simply to attend a second-rate programme in Poland.
Furthermore, the scholarship I as talking about was EXCLUSIVELY for students of my degree.
Are you really so naive as to believe that? Polish universities are notorious for telling countless lies to international students.
Actually, I've just found the scholarship in question. And you've been lied to.
It's only open to Polish citizens. Sorry. And it's not that comprehensive, it's only a tuition waiver which is hardly anything special.
I doubt that the University gets any profit from international students since most of them are European, and we pay no tuition fees at all in Poland.
I've just looked, and the course in question was so unpopular that they actually opened a second round of recruitment. That means that Polish students know that the course is worthless - and it also means that the degree is targeted towards non-EU students for cash. It might be mostly Europeans now, but Poland is only really just getting started with serious international recruitment.
Try to convince the BBC to train you while they cover all your living expenses in London for free if you think it is so easy.
I'm sorry, but I don't think she's telling you the truth. Private university graduates in Poland are notoriously bad, and many big employers have a blanket ban on employing graduates from them. For someone from a private university to get a funded programme at the BBC seems highly unlikely to have happened, although I can understand why she's telling you this (it's far less shameful than admitting that Daddy paid for everything).
Perhaps when you live here a bit longer, you'll start to understand what the difference is between a private university / studies taught in English graduate and someone that graduates from a Polish programme at a public university.