[Resolved]  Harman India — product submitted in warranty, it's been two months, didn't receive my product back

I have given my product within warranty period for repair, didn't receive product back its been two months now, i have submitted on 11-sep-19.
I have sent many mails to them even called them. Always they ask to send invoice, i have sent invoice for 6-7 times now. It's worst experience ever.
Kindly help me to resolve it asap

I have been following with them from long time now. It should just take 15 days max to replace.
Either give me my money back or give me speaker