My 2015 Elddis 155 has now had damp in the same place for the 4th time in six years.The three previous have been sorted by main dealers under warranty.Altogether 90% of the habitation has been replaced over the years.Warranty now finishes this May,Do I simply get the repair done once again or do I have any other course of action eg insist on Elddis paying for an independent repairer