Just been reminded by my misses...
Our 306 GTi-6 which was a brand new motor had over 300 miles on the clock, at the time we thought nothing of it as we were so excited about our first new motor. But that car was a dog and we found out through the grapevine that our car was used on track before we got it!!!! Gutted......... It would explain the issues we had, from brakes to steering the motor was a mess..... Never again!
Let us know how you get on with the rejection... Let them know your a Golf Forum user and will name and shame, it can work wonders....