Consumer Redressal

I bought Apple Airpods from Amazon on 05.08.21 vide invoice No: SCCA-18797 dated 05.08.21 . Amazon sent me an invoice without the serial number of the product printed on the invoice. As a result Apple has refused to register warranty and in fact Apple says warranty is expired. However the product has one year warranty. I have taken up the matter with Amazon and sent them 26 reminders till date to send me the correct invoice but they are not doing anything about it. I have taken the matter with Apple also but they say they need an invoice with serial number. I believe Amazon in connivance with Apple has sold me second hand Airpods and that is why they are unbale to give an invoice wirth serial number and Apple is also not doing anything. Please help