I came in to get an oil change on my 2009 Jetta. I had asked for full synthetic on the phone but forgot to clarify this when I came in in person.
After filling it with synthetic blend and seeing my concern (Online there are many warnings to only use full synthetic) they offered to drain and refill it with full synthetic for only the difference in cost. Amazing customer service!
(And to be fair, other posts suggest that synthetic blend is OK and the KC Autoworks guys know more about VWs than I, so most likely it would have been fine with synthetic blend)