My problem is everything proceeding too slow
Well that's an interesting problem and I'd like to take the opportunity to speak about Poles and work for a minute.
You have to get inside the mind of the typical office worker here. To them, work is nothing more than a way of getting money. They are usually paid below market rate (possibly because when you apply for a job here the employer asks you "How much do you think you should be paid" and everyone underestimates themselves to get the job) and have little hope of promotion or interesting tasks unless they're shagging / related to the boss
Their psychology operates on a simple principle of "minimum effort, maximum reward". They will do whatever they can to avoid work - not answering calls is a common tactic but they'll dump the work on someone else if they can or even just deny the job ever existed. A Richard Pryor sketch comes to mind where he says that if your wife catches you in bed with your mistress, just keep denying you're shagging her - tell her she's wrong, that you're reading a book, that you're alone and so on.
So to deal with one of these idiots (whose only qualification comes from a degree course where they went partying with friends and sucked up to the lecturers to avoid work) you have to shift the cost / benefit ratio in your favour by making it more difficult for them to ignore your request.
This is difficult though. I'd say go to the boss (as long as it's not her dad) and complain. Alternatively, try to find someone else in HR at her level who will (usually) be grateful for the opportunity to deal with it (hence getting one up on their rivals).
Don't be scared to act angry. hurt, bitter, vindictive or throw a childish tantrum. In any civilised country this would mark you out as an immature loser unworthy of anything other than the acting profession but in Poland it is often the best way to get service from bjurwas.
The best of luck. Let us know how you get on.