Warranty and Service issue

Location/place: INDIA

Name of company/service: DELL

I HAVE PURCHASED DELL LAPTOP INSPIRON 15R N5110 ON 26-OCT-2012 WITH SERVICE TAG G89WQR1. SO, ACCORDING TO RULE I GOT ONE YEAR WARRANTY BUT DELL WEBSITE IS SHOWING UPTO 18 JULY 2013, I CONTACTED DELL REGARDING THIS IN MONTH OF MAY AND THEY SUGGEST ME TO TALK TO DEALER. SO I MAKE A CONTACT NOW DEALER IS SAYING THAT THEY HAVE SEND DETAILS TO COMPANY, BUT STILL THE WARRANTY IS NOT UPDATED.
I JUST WANT TO KNOW WHY CUSTOMER NEED TO CONTACT DEALER REGARDING ALL THIS ISSUE??, WILL ANY CUSTOMER BUY A LAPTOP AFTER SEEING A DEALER OR A COMPANY??,
I SAY THAT I DON’T KNOW DEALER, I JUST KNOW THE COMPANY BUT COMPANY IS NOT GOING TO SOLVE THE ISSUE.

2) THERE IS MANY HARDWARE PROBLEM IN MY LAPTOP, LIKE :
a) SOMETIMES ON DISPLAY THERE OCCUR SOME LINES WHILE USING IT AND SYSTEM GETS HANG UP THEN I HAVE NO CHOICE OTHER THAN MAKING IT RESTART. SO ACC TO ME THERE MIGHT ME PROBLEM IN DISPLAY.
b) BATTERY LIFE IS GETTING LOW, AS NOW IT LAST LONG ONLY FOR 1:30hr APPROX.
c) CHARGER GETS OVERHEATED WHILE USING.
d) SYSTEM AUTOMATICALLY GET HANG UP AFTER SOMETIME , THEN I HAVE TO RESTART THE SYSTEM AGAIN. DUE TO WHICH THERE IS LOSS OF MY WORK.
e) SOMETIMES SPEED OF PROCESSOR FAN IS HIGH.
f) THERE ARE SCRATCHES ALL OVER THE BODY OF LAPTOP.

I MUST SAY DELL HAVE WORST SERVICE AND WORST PRODUCT ALL OVER THE WORLD. DELL IS MAKING FOOL OF CUSTOMERS.