Lenovo — mobile under warranty

Address:

Ahmedabad, Gujarat, 380050

I have given my mobile for repair which is still under warranty 30 days but still no they says it under process
Very worst service of replacement from brand like lenovo.
When we ark for how much time it will take they says one week i am tired of this. So please solve my problem.
There is no phone response when we call then it is always busy.
We have to sit too much for our turn to come while submitting or ask any simple question regarding phone.