I took a look at the recent 2 cases that you reported, and both were fixed as should. The first one of confirming your choice was a general bug so it took a few more days than the second one, that was not an actual mistake in the promotion.
I can see that Customer Support always raises the cases internally when it's something they can not, don't know how to, or are not allowed to fix by themselves. Unfortunately this process might take some time depending on the issue.
If you want, I can take a look at the chats you've had if you think there's something there that could be handled differently?