Uber Earned Cashback Rolling Back To Uber

Hi guys, I've subscribed to Uber One, I've been using Uber Eats and Uber Ride.

I've been gaining cashback for the past month, but for some reason my balance os R0.00 and the cash earned has been going back to Uber, I have not even used it.

Can somebody explain to me why is that happening? Why is the money earned being transferred to back to Uber?