Driver cancelled my trip

<p>So I requested a ride through taxify and i was very sceptical in using taxify and was in 2 minds whether to use my credit card or cash and because my friend recomended taxify he gave me a promo code which can only be used when paying with your card however when I requested the ride I made sure I entered the promo code before going ahead and thought I'm getting a free ride for up to R100 as the promo code states but when I mentioned to the driver that I'm using a promo code he immediately stopped the car and wanted me to cancel the trip which I did and I rescheduled the trip but this time taxify deducted money from my bank card and I want my money refunded or I am going to take this further simply because I used the promo code so nothing should of been deducted from my bank account and this is the reason why I never wanted to add my card to the application because I never gave taxify authorisation to debit my account so please I want feedback or a solution to fix this and I tried sending the driver a message and even left messages through your contact support but they just as hopeless and if this is the service you offer to your customers then I am definitely not using taxify ever again and I will most definitely not be recommending your company to friends and family </p>