Amazon India — nokia 4.2 model

I purchased nokia 4.2 and it is having problem in ear speaker. I submitted complaint also first they told to reset the phone i did it. Then they asked to install blancco app i also did it. Then they asked me to arrange another phone to call. I have gifted this phone to my sister and she is mental patient she can't talk too much over call she is not having any other phone. Amazon is irritating and not replacing the phone.
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