failer to keep promises

I had a young adult benefit reward of R1783, 83 this was according to the email I received in November 2015 and in that email it was stated that they will call me to confirm the banking details, and they never did. A week later I got an sms saying that the reward will expire in 1 day if I don't confirm the bank details. I called them to confirm, I waited until December there was no sign of that money. I emailed them asking about the reward, then they respond by saying I will get it by the end of the year which I assume was supposed to be the 31st of December 2015. I haven't received the money until now, tried calling this January but now there's no response from them. I must say that I'm quite disappointed with the kind of service that the discovery insure has offered to me so far. It makes me feel unsafe should anything happen to my car it shows that this is the kind of service I will get.