Buy and Get Voucher Myth

I purchased two Samsung fridges in December last year from Makro. I chose to purchase Samsung because of their product quality and especially because they were running a Buy and Get promotion where I could get either flights or a hotel stay. Despite a number of telephone calls and emails since January I still have not received the vouchers. Even after saying to Buy and Get that I will report this to Samsung they did not bother to respond or assist me. I am very happy with Samsung's products but I am very disappointed about receiving this type of treatment. With Easter holidays having passed I no longer have use for these vouchers. I want to know what Samsung will be doing to mitigate the risk of this type of customer experience recurring.