[Q] Google Play localisation

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A week ago I saw that Google is giving free copies of few movies in USA, UK or Australia.
I thought about trying to get them even if I live somwhere else (Poland to be exact), but forgot about it.

Today i saw that they give Frozen OST for free, but only in USA, so I thought maybe Ill look for a way to get it, so later if again something will be free for specific country i could get it.

I used CyberGhost to change my localisation to USA and I found out that Frozen is free and ready to be downloaded. However after clicking "free" payment window shows only for second or less and disappear with information "An unexpected error occurred. Please try again later.".

Any idea? Maybe other app to change VPN or manual way to become real citizen of the world?

Thanks in advance