Amazon India — complain about product refund.

Address:

hno 90 village rasulpur po ranikhera delhi, 110081

I purchased redmi 6a in january 2019. It was returned by me due to some fault in the product. It was retuned on 7 feb 2019 to your courier boy.. Moreover, the pickup bit did not give any receipt after picking the product from my home. When i checked the status on amazon customer care no, the representative said the product did not reached at warehouse... I have complained several times about issue. But my issue is yet to be solved.. It is requested to please update my status. I am enclosing the product's details with this email.
Amazon id - [protected]@gmail.com
Mobile no - [protected]