How do i owe SARS so much money

SARS says that i owe R58k. i am a government employee who is taxed +R6k every month. How do i owe sars so much money? i am even afraid to file because it keeps increasing. When i call, it takes forever to get someone on the line. I once got someone but they never gave me a clear explanation. I started working for government in 2021. Before that i worked as a tutor at a childrens home. i also worked as an intern at a private school. All these companies taxed me. So please help me out here