BAD SERVICE AND FALSE ADVERTISING FROM MTN DIRECT

I did my upgrade with MTN on 2 May 2018. In the book for the May specials of MTN, it states that you get a Samsung voucher with a Samsung handset upgrade (R225) I did not receive the voucher with the handset. I have called on numerous occasions to the MTN direct line with no joy having to explain the same thing over and over. The consultant Thandeka does not get back to you, even the supervisor Shareeka ****inson who the matter was escalated to several times does not even bother to respond to any emails. Did MTN think I would leave it and forget ? The service is pathetic and false advertising by not giving you the deal as advertised.