Nissan Motors — battery drained within 1 and half years because of manufacturing defect.

hello, I am a Nissan micra customer. I am so sad that my car has break down more than 4 times . My car is on warranty period. The worst customer care service I have saw from Nissan they are least bother about customer till today they haven't solved my problem i don't now what to do kindly help me if possible. contact no [protected]