Poor service

Am so angry and annoyed I did returns in the past 4 years I never get not a single cent from Sars but this year when I was doing returns they said am owing then R12000 I log a call ask them how did I owe R12000 they explain this long summary with big English but they said I must submit IRP5 for 2021 and 2022 as well with medical tax certificate and the money am owing R20 000 they were already taking money from my payslip. They told me that I must wait for an appointment date 3 October at 15:00 they will fix the problem but they didn't stop deducting money. With the surprise on the 3rd of October they call me at 14:00 till 14:30 they never reach me because of network. Did they bother to call me at 15:00.I tried to book another appointment their system is ****ed up please you making things difficult for us. Please Sars update your system and stop robbing people that's my hard work earning money.I don't even know how to book another appointment. Am stuck