Bolt (Taxify) drive (Khumbulani) just *****ed me money

I just got ****** R23 by a bolt driver just now At 15:33. My colleague and I requested a ride which was discounted by R75 leaving no balance due. So when at the end of the ride it show that we have to pay R0.00 but the drive (Khumbulani -***) immediately removed it to show the amount that the tip cost insisting that I pay what is on the screen of his phone, so I paid with a R10 note I had in my pocket and make payment of the R13 with my bank to his account. I am so done with Bolt(taxify), I have always thought it's convenient but the drivers are *********, now am starting to get concerned about safety since they can ***** money like this broad day light.