Sony India — sony set

Sir/madam, given my sony set cd open close type has been given to service in the month of oct'14 and in a week time again its not worked, givne to sony service centre at trichy on 31st oct'14 /model no. MHC-GN77D and the job no. is J42667707.( proof attached) as of now, i dont know the status of my set. no one responded properly and not repsoning to my phone or in person. since sony is a branded one, i have chosen all my electronics in sony, but the service i received is very bad and im feeling very bad. pl. revert me and inform teh service centre to service my set and return it to me at the earliest. if teh company needs additional cost for the spares if required im ready to spend, but i need my set in working condition.