T's and C's should be explained!!!!

So I'm not happy at all. T's & C's should be highlighted. So I won a voucher in the Samsung Everyone's a winner promo. This voucher entitled me to a R400 Mr. D food purchase. The text message where I received the promo code said nothing about only being able to be used once. I ordered dinner for the family to less than the value of the voucher thinking I can use the difference at a later stage. Surprise surprise terms and conditions allow the code only to be used once. First of all it's disappointing that as a freebie for buying such an expensive device you get a measly R400 frikking voucher then they go and ***** the difference because us3 is not explained. Mr. D shame on you !