ah right,im not suprised mate,we had a new golf inthe other day,somw warranty work,and we were going to replace a rear light,the lady said she had been rear ended last year,and when we came to take the light out,the inner o/s/r quarter had been partly made up with what looked like mastic! the top bolt that should have slid through the bodywork that holds the light still,was sat in some sort of hard goo,no metal work there at all,no wonder the lamp wasnt sitting straight! they told her they had renewed the quarter panel,but had just pulled it out and filled the smashed area with this goo,it was a right mess
hope they sort yours bud