Bad Service Delivery

We purchased 2 vehicle's cash one from Nissan and another from VW at the glen. Nissan promised to have the cars delivered to us by 13 January then failed to do so their excuse was that there was a delay in registration , we were then promised to have the cars delivered by 15 January then we were given another excuse saying the cars had to go for valet we were then promised the cars would be ready 16 January we drove to the dealership and waited like fools only to be told the cars would only be ready at the10pm that evening. We requested that the cars be delivered on the Sunday. On the 18th we were told the dealership lost both car keys and that new keys were ordered and had to be reprogrammed . On the 19th we were told the technician would do the reprogramming the evening. Nissan promised the cars would be ready the cars 21st . On the 21st we drove to the dealership and we were told that the cars wouldn't start. We had endless problems and no apologies. Never will i ever buy cars from NISSAN or VW ever again .