cashback paid wrong

So I got my so-called cashback for last week and the amount just made no sense at all. It’s like someone spun a roulette and picked a random number to give me. I’ve tracked every spin and slot session, literally even kept notes just to double-check because I don’t trust these numbers most of the time. My loss amount was higher than what they calculated from and the percentage is totally off from what they promise.

This isn’t the first time something like this has happened either. I reached out to support, still waiting to hear back, but I wanna know if anyone else is running into these weird payout errors. Should I just expect them to always “miscalculate” or has anyone had it fixed before?