Lenovo — Windows related problem

Address:

New Delhi, Delhi, 110092

I Had Purchase Windows Based Lenovo laptop and the same is in warranty period now my hard disk is not working but the company only change hard disk and not provide any windows related problem nor provide any serial key number or CD show that the same is recover. However at the time of purchase the authorised dealer told me that the Windows is inbuilt in Laptop so CD is not require and in case of any problem during Warranty period our executive resolve all your problems including Windows related problem but now they as well as company back from there word.