Bad service from SARS

Every time SARS have to pay money out they looking for something not to pay out. This year they say the business owe them money from 2006, but I was still working on Mittal, and they say 2011 I owe them Vat as well but I registered the business in 2008. The business was registered for tax 2015, so I don't now they got there informations. Every thing was handed it by SARS by the bookkeeper now they say I owe the money for 2019/2020 tax year, you can phone them they don't give your an Explanation