Samsung - Not able to claim redemption offer

I purchase samsung galaxy s** and it was the *rd day of the offer span going on with it of buds pro at *** or **k voucher . From the moment i am trying to redeem the offer the only * things in stock are watches which will cost me ** **k after using the **k voucher making me purchase unnecessary and suffer other than that offer of buds pro which was the main qnd biggest offer given by them to attract has not even closely been provided or products like phone or monitor which will cost me **k and are still value for money are also not in stock. Customer care helpline is not able to help me at all and have no answers. This is very simple gameplay for fooling buyers in purchasing more goods and the heavy priced ones too because it was the * or *th day of the scheme and can not even closely be possible that all went off stock leaving just those * watches and its been * * days of the stock not refilled and it is very limited time offer making it get something or nothing at all.