Lenovo — unprofessional service

I have a lenovo k50040 cellphone purchased in september 2016. It had problem of auto restart from 1st aug so i handed it over to services center in pune on 2nd aug 2017. I have a few questions to ask.

1) customer care says this phone is not in warranty and need pop update to service the same, how come it is out of warranty in just 10 months?

2) customer care has written to lenovo to update on warranty and they are awaiting reply for more than a week now. Why so much delay in updating the same? Are we waiting for actual warranty to expire and then charge customer for service?

3) it was promised that phone will be repaired in 10 days (Which itself is very long period looking at other cellphone servicing criteria) but it has been more than 15 days and phone is not even approved by lenovo to services.

4) receipt provided by customer care neither had contact no, nor even any work order no, every time you call service center, you need to quote imei no, which is ridiculous.