Hp Laptop — worst laptop

Address:

Hyderabad, Andhra Pradesh

Respected sir/madam,
i have bought hp laptop dv6-6165tx model in march 2012. since the time i have bought,there were lot of problems with that laptop.its battery is not working properly,and when i leave my laptop for a while like a few minutes,it never goes into standby,instead it gets struck...its c.d drive is not working properly...wi-fi is not detected in my laptop. my laptop's memory is 750 gb..bt even when i loaded a 100gb or more...it gets struck all the time when ever i open my open any of those files i have loaded...i have send it to the service center by mentioning all these complaints..but they just told there is a problem in my operating system and they replaced...even after that not even a single problem is rectified...when i complained about c.d drive,they told me that this laptop is like that.how can they manufacture a laptop with problems...? how can i replace my laptop?If anyone knows, please suggest me...
Don't ever buy hp laptops....
thanking you