poor workmanship

I purchased a brand new nv200 in nov2014 and requested sliding windows and smash and grab added. I specified that they must be nissan approved windows and even supp**** an email that warned dealers not to use other windows. Salesman confirmed it was a european standard. After 2 months of various excuses the windows were finally fitted in feb 2015.however they kept the vehicle for 3 days making various excuses for returning car. When it was returned the workmanship was shocking the body of vehicle was damaged and not repaired the smash and grab had bubbles and the left and right windows were different. Furthermore the doors had been resprayed and no one wants to inform me what happened. 3 weeks of fighting with nissan milnerton and nissan sa and tommie hamman agreed it was their fault and would cancel the offer to purchase and agreed to send documents. They informed nissansa about this. Today at 1pm i get an email to say no documents will be sent and they want a meeting with RMI. How can they just chop and change with no recourse from either japan or nissansa. There are so many dissatisfied customers regarding milnertons shady deals and nissan international has not done anything. .