It is all clearly stated on the VWFS Hub, unfortunately unless they’ve been in the situation before and had a customer totally screwed over because of it they might not be aware of the policy.
However given how the cost of borrowing has increased VW finance will do everything in their power to not honour the original finance package.
When the business manager phones VW finance to get the campaign re-opened to send you your docs they ask for the VW order number to check when it arrived….
So glad I keep an eye on things on here 
I went to the dealership today and asked this question and was assured that although indeed the interest rates had as good as doubled since the order was accepted they would indeed honour the agreement.
I went on to say that I understood they might be willing to accept it but what about VW Finance ?
And the salesman suggested that they had honoured other sales, as if they hadn't then they'd have stacks of cars unsold because buyers would simply walk away from the deal unable to afford the newly presented offer.
As a matter of course, I've put the context of the conversation and agreement in writing to them.
I'm still wondering if I should double check with VW Finance directly ... might just well call them tomorrow to get my current settlement figure and ask the question !