Young adult benefit card still undelivered

I joined Discovery Insure in March 2014, I am still yet to receive my young adult benefit card after 15 months. I receive an sms every time the card has my pay back deposited but am yet to receive the actual card! I have phoned every month for the last 8 months and am still aimlessly waiting after it has \apparently"been resent to me 3 times! My last call was 3 weeks ago and I was told to wait until the 20th so as to allow it the 8 weeks to get to me. 15 months and still no card and no answers. This 'card' has R2500 on it that is owed to me by Discovery. Perhaps if I start withholding my premium every month something might actually be done about my complaint! I am not happy"