Dell India — Dell vostro laptop

I purchased dell vostro laptop almost over a year back online... Core i3 8 gb ram windows 10 installed. The system was super slow right from the first day so i somehow got in touch with dell support...
They responded like the computer slowly and awkwardly and told me the resolution steps which were so absurd... I tried to convey my problems time and again but they never helped till the time my warranty was over. As soon as as my warranty they are responding me so fast just to tell me their charges and how to pay them... This is what you get to suffer when you buy dell laptop