3 PRICE DIFFERENCES WITHIN 9 MINUTES FOR THE SAME RIDE AND DISCOUNT NOT APP****

According to my app I have a discount of 30% that expires on 3/3/21. This morning I requested a ride and this is the prices quoted within a timespan of 9 minutes. At 09:20 - Bolt R64 / Go R78. At 09:29 - Bolt R64 / Go R43. At 09;30 Bolt R69 Go R46. On none of these occasions was the 30% discount included. The lift was requested from exactly the same spot at the pickup location. I don't understand this and people should be aware of these fluctuations