Incorrectly charged for trip

I received a promo code via sms from Discovery when I activated my Discovery Uber Benefit on the 21st of November 2015. The SMS stated that my first trip with Uber will be free up to an amount of R250.<br> <br> Even though I app**** the promo code (Code: DriveMe3) to my account through the Uber app, I was still charged the full amount (R195.74) on my Discovery Credit Card for my first trip with Uber on the 17th December 2015. <br> <br> I am on the Discovery Classic Plan with VitalityDrive and also registered my Discovery Credit Card on the Uber app when I registered.<br> <br> Here is the sms I received from Discovery:<br> <br> Congratulations on taking the first step to using Uber! If you're a Classic or Executive Plan client with Vitalitydrive, your discount will be active within 10 days if you've downloaded the app. If you're a newly registered Uber user, your first trip is free up to R250. Simply enter this promo code: DriveMe3. T's & C's apply. Regards, Discovery Insure<br>