Poor quality product and service

I have bought Microsoft Lumia 535 handset – IMEI – 357791066924427 from one of the Reliance digital stores on 6th Mar’15 for INR 8999/-, within 1 week of purchase, the phone started giving touch problems and hanging issues. for which when I visited the stores, they asked to contact the service center which is 10+km from my house. Nevertheless, I visited the service center situated in RT Nagar near police station on 30th Mar’15 and lodged call and they just formatted the phone and gave back. after 1 hr of waiting period. post which the phone worked fine for 2 days and again started giving same problem. after a week, I re-visited the service center on 11th Apr’15 and this time they replaced screen and gave it back. but hell, still the issue wasn’t fixed but I came in a fix and asked for new piece replacement as its a brand