R500 Accessories voucher was not delivered - no response from MTN

I recently upgraded my MTN device and was promised a R500 accessories voucher. When the device was delivered on 7 March 2017 there was no voucher with the delivery. I contacted the MTN Contact Centre and reported this. I was told that the Sales department would contact me. A week later I heard nothing so I logged a ticket on the MTN Online Shop Web site. I received a confirmatory email saying that I would be contacted. I have still not been contacted. I again alled the Contact Centre and obtained a reference number and the agent said I woud be contatced by the Sales department. I waited another week and still heard nothing. On 26 March I spent an hour on the phone with various agents from the Contact Centre and Retentions, all saying that I should speak to Sales but that they could not transfer me. Eventually they got Sales on the line only for me to be cut off by them.

I managed to obtain a number for the so-called Sales department and spoke to Jen who said that the voucher would have been delivered on the box of the phone. I have now explained to at leat 8 different people that there was NO voucher on the box. Jen said she woould find out and call me back - surprise, surprise - still no response from MTN.

MTN, I have been a loyal customer with you for over 20 years, please do not chase me away but not delivering on your promaises and not responding to my issues. I have the reference numbers for the relevant calls.