Lenovo — Phone not working (not turning on).

Address:

Faridabad, Haryana, 121010

I purchased lenovo k3 note on 12th november 2015. Imei no. [protected] and [protected]. It worked well for 2 months and after that i started facing heating problem, touch screen issues and network related issues (No signals on the phone) with my device. I went to the service centre regarding this, they submitted my phone and after few days they returned it and said that, sir the heating issue was because of the charging jack and we have changed your phone's charging jack.

After 2 3 days i started facing heating problem, touch screen issues and network related issues again. I went to the service centre again, this time they said that sir the phone has software issue and needs to be updated and they updated my phone's software.

For the third time when i went to them with the same issue, they said that sir we need to check this phone thoroughly and you will get it back in 10 to 15 days. I agreed to them as i had no other option.
On the 8th day they called me and said sir your phone is ok now and you can collect it. When i went to collect my phone i was surprised because the service engineer who called me to collect my phone said that sir i think this phone still has some touch related issues and its motherboard needs to be changed, i will register an email and as soon as i get an approval i will change its motherboard and you can collect it after 2 days.

When i went to them after 3 days to collect my phone, to my surprise, they said ohh sir i have just got an approval to change your phone's motherboard and we need 1 more day to work on your phone. I was totally fed up of their reckless attitude and i said you just give me my phone back and i will register a complaint regarding this in consumer forum.
Somehow they convinced me and i got my phone on the next day (After 15 days).

This was not an end of my problems because i made a decision to purchase a worst phone (Lenovo k3 note).
After a few days i again started facing touch related issues, this time they befooled me by a new software update that was marshmallow just 2 days back and this made my life hell as because of their so called latest version of software update my phone is getting shutdown automatically very frequently (20 times), it has too many bugs. Many a time the screen became unresponsive and on the screen i am only getting the notification saying, "unfortunately, the process com.Android.Phone has stopped." there are two options, ok and try to resolve. I have opted both the options for hundred times and not that has not resolved anything and even requires force restart (As i have to take its battery out and put it back).
In the evening of 2nd of april it just shutdown and now its turning on, again my phone is with them.

In last 2 months i have visited that service centre 6 7 times and everytime they assure me that sir, this time you will not face any problem. I am totally fed up of the lenovo brand and their services.

Do i have a permanent solution for this. If any, please recommend me.