Samsung — Warranty Offer Issue: Customer Service Not Helpful

I had purchased this product on Amazon where is promised that I'll get 3+2 years warranty as per some festive offer. I can claim this warranty until 15th Nov on the Samsung website. When i tried on the website, it gives me the error that serial number is not valid.

I contacted Samsung customer care on chat and they asked me to contact their toll free number. I contacted the number and they said they can't help me with monitors, so they transferred my number to another helpdesk, and there they asked me to contact b2b.[protected]@samsung.com. I emailed at this email address and they asked me to visit the service centre. I escalated it to their service head as well as CEO desk but no satisfactory response.

I contacted the service centre and they told me that they confirmed with HQ that the warranty offer is not applicable on monitors. I contacted customer care again and they said this is false information and I should be able to claim the offer and they asked me to contact b2b.[protected]@samsung.com again. When i told them that i already contacted this email address and they asked me to contact service centre, the customer service person said that this should not be the case.

It's clearly mentioned on their product page on Amazon as well as their website, they are making me run around from team to team and not letting me claim the offer. I contacted all the below channels but keep getting template and contradictory responses:
1. Chat: https://chatbot.samsungcs-support.com/?source=dotcom
2. Phone:[protected]
3. Email: support.[protected]@samsung.com, servicehead.[protected]@samsung.com, b2b.[protected]@samsung.com, sales.[protected]@samsung.com
4. Service Centre