Samsung Buy&Get

We were coerced to purchase a Samsung refrigerator at Cape Gate Makro store with a promise that, as a reward, we would get R4000 in travelling vouchers. We bought the refrigerator with the hope of such promises. We followed every step as instructed in the brochure given to us with the refrigerator and were told to expect an sms back within 48 hours. Til this day, we have not recieved any sms. We have tried multiple times to contact them with no success until recently when a gentleman told us they never recieved our application for the reward. He, then, told us that the application might not have been delivered to them due to the type of phone we were using; which is, surprisingly, a samsung phone. We explained to him that we are very close to the of the expiry date of this program. He advised us to use a different phone and we did. We later recieved a response that our application was incorrect. Another problem is that their helpline operates only on weekdays and there's no way of contacting them now. We are completely disheartened by this. Our only option now is to return the refrigerator and buy the one we had initially planned to buy.