dell vostro 3568 hardware issues

I have a dell Vostro 3568 laptop. I bought it around 9-10 months ago. within two months of purchase there is a hard drive failure …..after 4-5 months there is a sound distortion issue …..for resolve that issue dell replace motherboard, speakers, charger still they were not able to fix issue then they pull my system back to compony ...….after 9-10 months there is an hard drive failure issue again after replacing it there is an touchpad issue.....at last when I asked dell about all this then they simply said …..these are hardware issues and it can occur anytime …… and suggested me to extend warranty…. Really its a worse experience with dell...