Between Nissan and Motorite they need to fix this.

My car is under warranty with Motorite and recently my radiator had a crack in so I took it to Nissan to get a new one since my car was under warranty. My claim got approved but low and behold no radiator was put in instead I was told to drive my car as is the mechanic at nissan said he would patch it until such time as they had a radiator to put into my car. A month later still no phone call from Nissan at this point I called NissanN to find out where is my radiator and all of a sudden they remembered I still needed one.Now I have the new radiator in but my top gasket has blown and now I'm staring at an account of R15000 to fix my car of which motorite is only paying R900. This is just pathetic behaviour from both companies and I expect to get this problem solved.