HP India — During payment by scanning QR code through amazon pay

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I have purchased hp NB DR 2006TU from PARK METWORK PVT LTD.
I have paid payment by scanning QR code through may amazon pay account & received rs. 1500 cash back on my amazon pay account. HP representative claiming that Cash back pertans to HP. Thet repeatedly insisted for transferring cash back to his account. Finally I have paid rs 1000.0 to him by UPI on [protected]. I want to knoe is cash back pertains to HP. If not pl arrange to return back rs 1000 to me

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