Hey all,
I'm gutted that I didn't read this thread earlier, but my 2010 Gti @ 75k has just had suffered the same fate. I had the tensioner, chain, guides etc changed hoping it would be no damage. No compression on any cylinder, now the head needs to come off and inspect whats happened. Still in disbelief 
damn bro, i feel your pain! was there any chain noise or did you check the chain reading in obd prior to this happening??
whats your next move? have you tried VW-UK? i gave up trying to get anything out of my local VW dealerships, they just wern't interested in anything other than getting me booked in and giving them permission to carry out the work
new engine from midland vw is £2,500