Interested to know if you found out what the dealer actually did with reference to the timing chain. If it was done by a vw dealer then VW should have a record in the service file, any vw dealer could check that..
So expect they meant the water pump belt!
Also, If you want assurance going forward, it is possible to take out a genuine VW all component extended warranty, you can do this on line, I did my 2017 GTI PP, in march this year and it cost £238. It may be more for the R version. but it sounds good value, The all component cover is like the original manufacturers warranty, and is available until you hit 100k mile, it covers everything except those bits that are normal wear and tear. (brake pads/discs, wipers etc.) As long as you service in accordance with manufs recommendations.
Incidentally, I am about to hit VW with a claim for new headlight units on my 2017 GTI because the plastic lens/cover has got what looks like tiny little bubbles or crystals appearing within the plastic in front of the headlamp beams. I had same on my RSQ3 at just before 5 years, and they put new units in under my original 5 year warranty, a fantastic saving!!.
I argued that the plastic must be defective if it deteriorates visibly even though the car sits in garage when not in use. it seems the heat generated by the lamps causes the plastic to deteriorate internally. Anyway the same defect has appeared in my GTI headlamps, so we shall see what vw say this time.
