Incompetence at it's best submitting false information

In 2023 post office submitted information to SARS in my returns that I have received investment payout of R23000.00. Now SARS are charging me penalties. I called SARS and advised I know nothing about an investment account and I don't own a post account they told me to call post office. I called post office and they advised I don't not have an active account, I asked why did they send information to SARS stating I have an investment account. I was advised to send an email to *** za and request tax certificate. I send the email requested the tax certificate so I can take it to SARS to show I don't have an account, the consultant responded with one line stating I don't have an account and they cannot send the tax certificate. I took that email went to SARS and SARS did not take the email as evidence. They said post office must remove the information they submitted it to SARS on the database SARS know nothing about my account post office is the third party that provided the information. I resend an email to post office till date I did not receive a respond. I don't have an account why false information was given to SARS. This is a very poor service and for post office to send false information it shows incompetence at its best. I need this sort and if you have an account with them cancel it before it is too late.