Samsung Flight Centre Voucher ****?

I'm very disappointed in the so-called Samsung-Flight Centre promotion that was supposed to gift me with a R5000 Flight Centre voucher after purchasing a Galaxy S8. I was asked to email a screenshot of my IMEI nr, which I did. And last week I received an sms with my voucher reference nr and an email address. I emailed a booking enquiry on Friday and received what seems like an automated response from Adrian saying that he'll revert back within 48 hours. Yesterday I emailed asking for feedback as it was 48 working hours later and received the same automated response. This morning I called Samsung, who referred me to Flight Centre, who in turn gave me a nr to call. The nr ********** 983 is registered to Adrian van Rensburg according to my Truecaller App. I've phoned a few times, but 'the subscriber is not available'. I was excited to book a flight at the end of the month to visit my friends and family in Durban during the school holidays. And according to the sms I'm supposed to make a booking 4 weeks ahead of time. Was this all just a **** or false advertising to get people to buy your product?