Sony India — sony service centre not doing well there work

Address:

Bangalore, Karnataka

As my mobile is not in guerenty period. so there was problem for microphone so i went to customer care they take my phone and told me collect after 3 days then when i gone to collect my phone what i found that they have broken my front pannel so i gave to them and they replaced it without any charge for that .now i am facing problem that my battery not working properly it consume power 10 times more .so i gone to customer care and told my problem so they took my phone again and they tested it battery and took 168rs and still the problem is there .so they told me that there is motherboard problem .so i belive that they have changed my mobile motherboard or they have damaged it during repairng .so i want my problem to solve .can you suggest me some good solution for this .And by seing this issue i afraid of sony service center .