Dell — breakdown of laptop.

Address: Bharuch, Gujarat

I am having Dell Inspiron 15 3521 laptop, I am experiencing problem working with it.when I plug in the charger, adapter gets the power light and then all of a sudden the light goes off and the laptop breaks down automatically. I had already experienced this problem twice, they had fixed it by replacing the mother board and this is the third time it has happened.Previously when I had launched the complaint for this problem I was assured that if the same problem occurs the third time I will get my laptop replaced but now on third time failure they are denying for laptop replacement and say only part will be replaced, having 90 days warranty of the replaced part only. First time it had occurred on 4/12/2013 and after the replacement of motherboard this same problem again happened after 15 days on 25/12/2013 the complaint number was:[protected], it was assured again motherboard replacement and now again same problem for the third time on 30/03/2014 the complaint number:[protected].right now my laptop is completly dead and all my data as well as my work is stuck.the warranty period gets over on 15/05/2014.what if the same problem occurs the next day after the warranty expires?? So I want my whole laptop replacement not its part replacement.. whether Dell is having Laptop replacement facility or not...??