Ms Des-Fountain puts the overwhelming response to her appeal down in part to the South African government's inability to find a solution for Zimbabwe.
"What is our government doing? Let's be honest - they're not doing anything," she says.
"People are calling me asking me what can we do. They wonder what they can do because our neighbours are suffering so much."
Zimbabwe's problems are such that Ms Des-Fountain's truck is barely even a drop in the ocean.
But for Thulani's village it will make a real difference.
For those with cholera or chronic malnutrition it may be the difference between life and death.
While Southern Africa leaders may have drawn a blank, Ms Des-Fountain's one-woman aid mission is a reminder that there are still those who refuse to accept that Zimbabwe is a problem beyond hope or resolution.
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