So... Just called TNT and told me that I just had to pay after all.. Because it's coming from Hong Kong.
I told them I've ordered it from Finland. Also told them that many other users online had the same issue and that they showed the invoice with the VAT and that they do not need to pay again.

She took some notes, and they'll be getting in touch with me when they have some news...

I'm not paying the these taxes... Because like I said to them, I wouldn't accept the package if I had to pay taxes at the end....