I doubt it has anything to do with battery in key, it's only 8 months old. And definitely not related to new issues. HVAC didn't work again after restart at petrol station. I learned that booking service is more hassle than driving car that doesn't work randomly. Euroseat Crawley said, that they don't offer loan cars and you can't wait on site. I asked them if they wanted me to walk home 15 miles then.
So, when I cool down, I will look for another dealer, but this time, will start conversation with question about loan car. Someone complained that they got
Ibiza on loan, that's better than nothing.
I didn't get rid of the car using preferential early termination, because VWFS failed to provide purchase quote to the dealer. Without their cooperation, it was impossible to make it work. But after reading that number of people managed to reject their cars, I will try this route now.
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I managed to book the car into Citygate Twickenham, but it's in November. Apparently they expect SOS software update soon, but don't know when.