mate i'm in cyprus, there's no such thing as trading standards.
Try trading standards.
Really, you're going to offer that advice?

Healthy and a good perspective on the size of the problem. 80 euro...
You have now posted 2 threads about complaining to Germany. Apart from the stress you are causing to yourself and those around you, Germany will likely come back with support for the dealer who are abiding by the T&Cs of the warranty contract. Which you are not. That will only cause you more stress.
I think you should mark it up to experience and let it be. 80 euro is simply not worth the hassle. IMO.
It's not about the 80 euros mate, in the past 10 years i've paid over 120K euro for 5 brand new cars for myself and my wife [Golf TDI MKIV, Golf 1.6 MKIV, Polo, Golf GT 170 MKV, Golf GTI MKVI] [all for private use] and I'd expected the local VW to show some courtesy and not throw the maintenance card to my face for 80 lousy euros, especially for a part (hatch struts) that's not even engine-related. Plus, from what i know, the law in the UK for instance says warranty is valid irrespective of the garage that is doing maintenance, as long as it's VAT registered and uses genuine parts and just wanted to check whether VW has an international policy on this or whether it comes down to the laws of every country. Cheers.
I think you should take the above advice.
Not least because it will let you get some sleep but also because if you manage to kick up a fuss and get the dealer to replace said struts, would you really feel comfortable that they are going to give your car the care and attention it is due?
If the office is run by monkeys then you can bet the workshop will be run by monkeys too.