HTC — Ac adapter is not working

Address:

Bangalore, Karnataka

i had purchased htc 816G mobile on 13 may 2015 in Bangalore, with in a month Ac adopter got defected, i gave this ac adopter to the service center on 20/06/2015 at southend circle Bangalore, they took this and told me to come after two day, like this i went thrice to the service center, the service center number which they have mentioned is always busy, leveling my duty, wasting my time, waiting their till my turn comes, spending money for petrol, thinking that, now i may get now, its of no use, going there often i got frustrated, i met the employee by name RAZI and took his number, so that i can call and come, his num was always switch off, they again i went there and explained my embarrassment, he said to meet manager name sendil, i met him he gave his mobile number saying that the ac adopter is out of stock, it has to come from chennai, you come after 5 days, iam trying his number he is not attending my call, i have send a whatsup message, and sms no response, now what should i do, for this kind of negligence...