Lenovo Zuk Z1 — Mobile is not working properly

Address:

Mumbai City, Maharashtra, 400076

Lenovo zuk z1

I trusted this brand but this mobile gave me headache.
Within a 2 months it started giving problems

Problem 1- sim card not detecting

After 1 month sim card is not detecting in handset.
O i submitted the mobile to lenovo service center at borivali (Mumbai).
To addition to problem the service center don't know the actual problem they just change the motherboard which took almost 1 month.
Their service is pathetic. The staff is not customer friendly they don't give damm about customers problem and time.
They even didn't pick up the call which was given by the as contact number.
After 1 month i got my mobile with another problem\

Problem 2 — charging issue.

After getting my mobile next day it shows another new problem
The charging not goes above 50%
And suddenly drop to 1% and get switch off.
Again i submit the handset to the same service center.
Again the same procedure they took 2 weeks to solve the problem and in that period hey didn't pick up the call not even once.

This lenovo product is just filled with the problems.