Hp poor service support

I have purchased HP PAV 15-N019TU(5CD33663CQ) dated 7-nov-2013 from K.P INFOTECH bali nagar.I Have W8 installed in it and it get corrupteded in four months.I have visited customer support centre(JUBIL-RAJORI) And K.P INFOTECH but i m not at all satisfied with the service,i have recovery DVD'S with me but they are saying some files are missing in it.I m very annoyed with this behaviour of HP. Other Brands show really a good sevice support like SONY, LENOVO,ACER.
i want original window8 in my laptop as soon as possible.waiting for your response

akanksha
(akankshashrivastava800@gmail.com)
8010261388