I had issues with redemption of buds on my galaxy s20+. I purchsed device on 6th March. I tried redeeming offer but message was sent to second sim. Whatever i tried nothing worked.
I contacted samsung support and they were just doing nothing. So finally, I wrote email to Samsung India CEO office and they resolved issue in a day. Link-
So i suggest if you are still unsuccessful to redeem offer, write to ceo office. I ordered my buds today morning and they are already in transit.
One more thing, as Corona virus is taking over India, suggest you redeem and order at earliest so that you get it early. Otherwise there might be lockdowns in major cities and you will have to wait
