Samsung — Galaxy buds live redemption issue

I called Samsung helpline before purchasing and was informed about the Galaxy A73 Buds Live Bundle offer (sharing the document). And he also directed me to the T & C page and told me that even if I purchase from Flipkart I will be eligible for the offer. I have tried redeeming the offer from Samsung Shop app and it was mentioned Device not eligible for redemption. I have also tried contacting Samsung regarding the same and was informed at first that I am not eligible because I purchased from Flipkart. When I send them the T&C document they said that I have to contact the point of purchase for the issue. No where in the T&C it was mentioned that I have to contact point of purchase if I cannot redeem the offer. Even in the Shop app it said to contact[protected] for redemption support.

Samsung closed my case on National Consumer Helpline stating that I reported this issue after offer period is over which is a complete lie. I complained on 11th September and following up with them since then.