Xiaomi India — Problem with Redmi 3s prime

Address:

683547

Sir,
I am using redmi3s prime modal last 4 months onwards.till last month it was running properly. But now it's showing the following 3 issues.
1. My mi account password did not accept.many time I have changed password but all the time which is not accepted by my Redmi 3s prime. and it shows invalid password or username.How can I fix it.please helpppp..

2. Some times while attending call, mic won't work, then need to be re-boot. likewise some time while calling speaker won't work.which can overcome by power off or re-boot.

3. Last 2 weeks onwards it showing some network issues also. I am using jio, lost net while I using mobile data frequently.aftersome times it will come automatically.all the times the data button is on.