Asus — Given the laptop to the service centre for more than a month, no progress in recovery

Address: New Delhi, Delhi

I've bought asus X552L NOTEBOOK on 17 Feburary 2015. There was a problem with the graphic card from beginning. I'v given it to F1INFO SOLUTIONS AND SERVICES (asus service centre in nehru place, new delhi) on 31 july 2015. they were unable to repair it after keeping it fir 3 weeks. then on 24 aug i' taken it from there and given to another asus service centre in noida. they are unable to repair it till now. i want them to either replace the notebook or refund my money.