I asked around and I'm affraid you are out of luck. Everyone agrees that the Dutch technology is so advanced that no Polish technician can even dream of repairing those crudely welded rockets.
Sorry for the bad news.
I want to lodge an official protest here :). God knows that being Flemish I pray every day for the Dutch to loose in South Africa :)
But I do not think any thin-plated fragile Giant bike can compete with my Dutch bike.
The Dutch are good at making bikes, even if I hate having to confess that :)
It will go on indeed for the next 30 years or so. It is not made to impress, just brings me to my pub in a reliable fashion.
In the meantime I have asked in the local bike shop here in Bielany. They scratched their head a bit on the advanced technology but will manage :)