Does tax threshold still apply to me at age 78. I understood that I shouldnt pay tax at all

Thanks for helping with my tax return! I expected to get a bigger refund. I am 78 and understood that any tax paid would be refunded in full, but am told there is still a tax threshold?

For taxpayers aged 75 years and older, the threshold is R128 500. Therefore you only pay tax on earnings above this amount.