Sony India — sony xperia xa1 phone

I bought a sony xperia xa1 from singapore about 3 months back now the phone battery got dead it's speaker is not working... Then i bought a new battery without warranty as the sony service centre authority told me they can't do anything about that if the phone is brought from outside the country and they told they can't do anything about this issue and i got a worst service from their concerned authorities... Now the battery life is about 2-3 hours after changing the battery... I am having a serious of worst condition after using a sony product... If you can help me it will be grateful...!!!