Dell — Replacement of speaker (within warranty period, but they say it can't be done)

Address:

Pondicherry, Puducherry

I replaced my dell xps14 speakers as it was having some problem. But within 3 months warranty period, it had some issues and they found that it needs to be replaced. But they claim that warranty expired as my billing data was a bit early in end of october'13, but my part got replaced on 11/1113. I raised this issue in call and I have the mail of my replacement history. Please take this issue and help me replace my speaker.