Have you been to your dealer?
I've heard some horror stories from VW R32 owners (in real life, not on forums) of them having all sorts of camber issues after going to tyre and suspension places, and the only way they got them fixed was to go back to their dealer. Whilst not all dealers have their own equipment to do the work, they usually have a local shop that has worked on enough of them to be familiar with how the cars are meant to be setup and adjusted.
So that'd be my first suggestion.
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