Peugeot 308 Gearbox & Transmission Problems
Peugeot 308 2009: Turbo touring wagon long list of issues
The answer lies with the dealer and the Peugeot distributor. Presumably the problems that have so far occurred have been fixed, so while you have lost confidence in the car you really can't predict what might happen in the future. If the problems haven't been fixed request a meeting with a senior manager at the dealership and have them give you a plan of attack that will see them fixed. Feel free to get Peugeot involved directly.
Peugeot 308 2010: Clutch slipping
Yours is the only complaint we have received to date, so I would suggest it's not a widespread issue, if indeed is an issue. To have a clutch slipping at such low kilometers is very unusual and I would be sceptical about it.