the old renault wont allow it lie, its complete bull and horse S%%T, I have litrally had my last 4 cars from in stock and been in them within 10 days.
Ring round other dealers you will find a good one but may have to travel, also contact them 3 days before the end of the month, if their quota is low I am sure they will help, I bet this dealer is the only renault dealer for miles so they think they can dictate their own rules as they dont have much competition..
There is 100% dealers out there that will be willing to let you have one of the central stock orders, what happens with renault is they ship loads to import centre and the dealers are allowed to order so many from there (each dealer) dealers will want to sell.
You also have to remember were in june now, June July and aug sales are slow due to people more concerned about holidays rather than buying a car.
ring round and be prepared to travel and open on colors I am more than sure you will find a dealer that will let you have one of the july cars.