HTC India — mic and speaker are not working

Address:

110044

I've htc 828 and the mic is not working properly.. I visited service centre 4 times for the same problem but they are unable to resolve the issue. My charger is also not working and they are giving me the charger which is different from an original one... I'll not suggest anyone to buy htc phone.. The staff is also impolite. They don't even talk politely with customers.