My dealer sold new van was actually 2nd hand

In May 2017 we bought our first new caravan a Jurgens Classique from Sunseeker Jurgenzs in Alberton, the intent was that it would be our retirement van in a couple of years time. When buying the van I was told it was new, had never been registered although it was the last of the old shape and built in 2016. We loved the van but that all changed when the suspension sagged and the van was taken to Jurgens to repair / replace under warranty. When the axle was removed it was noted it was manufactured in 2014, further checks showed that the van was built in 2015 and sold in 2016. Jurgens head office immediately requested the van back at the factory and it would be replaced with a new one as that was what I paid for, I was told my new van would be delivered in 2 to 3 weeks (That was January) we finally took delivery of the new van in May 2018 5 months after my original van was returned. It is now August or 8 months after Jurgens took my van the old van is still on my name and the new van has not been registered yet, this despite numerous phone calls, visits to the dealer in Boksburg and a lot of e-mails. It is very frustrating as promise are made by Jurgens and never kept.