How do I get SARS to acknowledge my expenses?

I sent through all the supporting documents but SARS ignored my expenses and redid my tax return and are now saying that I owe them?

You will need submit a dispute via SARS eFiling and attach the documentary proof of your expenses that you incurred which SARS disallowed.
Kindly follow the link for steps on how to do this:
https://www.taxtim.com/za/blog/9-steps-to-file-an-objection-to-your-tax-assessment?answered=1&type=organic