I agree it would be a lot better if they just told you about how much waiting to be expected beforehand.
That they said 5-7 days and then just didn’t, absolutely sucks. I do somewhat hope you just happened to be unfortunate enough and the doctor had some emergency that they needed to go away for. So that when you checked in it was supposed to be 5-7 days, but something happened and not that they said it knowing that the doctor was about to go on vacation.
If they did do the second option and I missed it I the text, then that sucks even more and you have my deepest sympathise about the situation. That should not happen on any hospital, let alone a highly rated one, especially where you are as it usually cost an absolute fortune.