My number didn't take so long to be called (it was a Friday morning) but the lady at the desk (old one) was very unwilling to solve other people's problems, luckily I had had my instructions taken before by another employee, so I just quickly got my number with her.
I visit this PSC periodically. It's a pretty lively place, there are always a lot of people. However, there are enough competent specialists. There is no heavy waiting in a long queue. The staff is trained, very helpful and attentive to the visitors. They really help and prompt even outside the scope of official duties.
I came to the PSC in order to restore the cancelled IIN (previously it was issued to citizens of the Russian Federation remotely, but then it was massively blocked without notification). 12:00 - I take a ticket for "IIN adjustment" at the reception. 12:40 - I go to counter 13. The operator, without even looking at the passport, said that he did not have the authority to make adjustments and needed to go to counter 18 (3 people had been sent there earlier), however, the employee was at lunch and needed to wait. An hour and a half passes, 8 people have already gathered with a similar problem, but there is still no employee (as it turned out later, no one will appear at counter 18 throughout the day). They found the boss - a man in a suit, in a dismissive and arrogant manner, sent everyone on a first-come, first-served basis to solve questions at counters 28 and 27. I go up to counter 28, explain the situation, and get an answer: "It says cancelled, ohh.. let them figure it out for themselves." Counter 18 is still empty, so I turn to the next counter 27 and explain the situation again. I get the answer: "we can't adjust the IIN, we need to issue a new one." 15:05 - I take a ticket for registration of a new IIN. There are a lot of people gathered in the evening, the room is stuffy, the situation is tense, it becomes clear that this will take a long time. I went to a nearby Qazaq Fast Food and ate a delicious beshbarmak. The queue came to 6:10 p.m. and again to counter 13. He told the chronology, the operator was surprised and said that he would send the application, but he was not sure if it would pass. He also said that nothing needs to be paid at the checkout yet, because it is unclear whether the number will change or remain the same. If it changes, you will need to pay, but I did not explain the procedure (earlier they issued a new IIN to my wife here - they sent 5750 tenge to the cashier, the legality of this fee is questionable, since information from different sources differs). The next day, I received an SMS notification about the registration of a new IIN number (only one digit at the end has changed). Bottom line: 6 hours were spent, but the issue was resolved. Now I'm going through equally exciting procedures to update it in the information systems of related banks (spoiler alert - not everyone has this technical capability).