Incorrect charges

When I booked my Didi rides, I selected Didi express. it indicated my discounted price, I then get verified and after verification it just went on to search for my driver. I did not change my tarrif. This automated change happen d on all 3 occasions as I accepted that I may have made a mistake the first time ( which I did not). I would not select XL as I was a solo passenger with no luggage etc.

Attached please find a screen shot of my last trip.

It clearly shows / highlights express with the charge. I then pressed the confirm button which took me to the face verification. Then searched for a driver. So the fault is definitely not on my side.

I followed the correct process and I kindly request for the reimbur*****t of the difference of my 2 rides on Saturday 24 July 2021.