Sony India — Microphone not working

Address:

Gandhinagar, Gujarat, 382007

I gave my Sony Xperia C4 dual because my phone wasn't starting. they told me that there's a battery issue and asked me to change it, i consented for that. when i got my set back the both of my sims network wasnt working. i gave it again they repaired it . after a week my front camera wasnt working. i again gave it to repair. now my microphone is not working.
i am fed up of going to the service centre again and again. i dont know why is it happening, my daily life is affected with this problem. they are saying it will take 10 days to repair it.