Nokia India — I'm complaining about the awful service provided by nokia

Address:

Kolkata, West Bengal, 700106

I purchased nokia 6 on 17th nov last year. After using the for 7days, i found multiple problems including camera and heating issue. Then it's fixed by the tech support team of amazon from wherele i bought that phone.
Again a new problem finds me afterwards. This time it's speaker. Whenever it's turned on, the voice is not hearable further. I admitted that phone in my native service center regarding replacement this time. They assured me about fixing the phone but this time i'm determined. I won't receive that defective phone for any more complications in future. Being tired and frustrated about the hopeless service of nokia executives, i'm bound to submit this complaint on this forum.
Hope nokia still have some awareness about their customer feedback.