HP Pavilion DV2701TX — wrong part replacement and ill treatment at service centre

I have a hp pavilion dv 2701tx laptop. After seven months o[censored]se i had a display problem and i was told by the service center people that the mother board needs to be replaced and it will take a week time. But even after 20 days i had no response from service centre. When i asked them they said part not available. Than when i received the laptop after 25 days it had a compaq motherboard inside. They said it is not a issue the motherboard is compatible. When i checked my system my nvidia inbuilt graphics card was not to be seen, mute button not working, recovery not working etc. They still compelled the system is fine reinstalling OS will solve the issues. The service center is located in salem (tamilnadu, india). I took the laptop back to my home at gujrat. I reinstalled the OS but problems were not solved. Again i gave it for repair at salem service center, they replaced the motherboard again but this time it had nvidia but with 64mb memory. I initially had 128 mb graphics card. The mute button and recovery was still not working. All these replacements took about four months and uncountable trips to service center. Than finally i took the laptop to ahemdabad (gujrat) gave it over there and they replaced the motherboard correctly but now my fingerprint reader and webcam is not working. The system hibernates automatically often. Even launching a complain on hp.com is worthless as they will call the next day and thats all they will never call back. So five months of warranty was wasted in repairs and now i am really frustrated and annoyed with hp. I thought of filing a consumer case but no time...if anybody can help pls mail...([protected]@gmail.com)...ph-[protected]