Vodacom refuse to honour their offers on Samsung Galaxy Note 8 and S9+ !!!

I purchased a Galaxy Note 8 in December, 2017 and was promised a R5000 travel voucher from Flight Centre. To this day I have had communication with Vodacom Eastgate, who do not accept any responsibility. I have sent all documents and emails to Russell at "Buy and Get" and still couldn't give a damn. I am disgusted in these companies and now demand some answers. I have also just bought a Samsung S9+ and promised a 128GB memory card and Samsung Dex Pad. Vodacom and Samsung refuse to help. I have been with Vodacom from day one and this is how they treat me !!!! I want the CEO to contact me urgently !!!!