Sony DVD Writter — v poor service in rashi peripheral in nagpur city

i purchase a sony dvd writter from retailer in nagpur city, after purchase i face many problem in dvd writter, i go to service center in rashi peripherals for service, after 15 days he give a new dvd r/w . but also same problem in this dvd writter (read & write) . agian i go to service center so he reapiared and give to me 25 days, after 7 days again problem in this dvd writter so i go to service center but he say is cant reapaird so u will charge for 500 rs. i residence in rural area it so long 150 k.m in nagpur city, so i request to any friend dont purchase a produt of sony company . it is frod for customer