Xiaomi India — Software Problem

I had purchased Redmi Note on December 2014, recently my phone received wrong software update due to which it was not working. I submitted the phone to New Tech Solutions Vashi (Official Xiaomi Service Centre). They told me that it will take 15-20 days for the repair and they will call us. I called them after 20 days and the service person told me that the phone is repaired and you can collect it. I went to the service centre and they made me wait for 2 hours to tell me that the phone is not repaired and will take 10 more days. I again called them after 10 days and they again told me that the phone is repaired. I went to the service centre and they made me wait for again 3 hours to tell me the that the phone is not repaired and will take another 2 days. After 2 days i called them and they told me it is done. I went and waited for another 2 hours and received my phone. It took them 1 month to repair a simple problem of software update. Now i am again facing problem of battery drain in my phone and also that they put scratches in my mobile phone camera. I was so fed up of them that now i have given my phone to outside service centre for repair. Xiaomi phones are really good but the service centre in Vashi i.e New Tech Solutions is worst service centre. It is not just me facing issues but there are many people who found that the service centre is not doing their work properly, making people wait for 2 hours.