Couldn't get my UACE slip at my former school

Currently waiting for a response from Uganda National Examination Board (UNEB), they should respond promptly and normally no later than (details).

Dear Uganda National Examination Board (UNEB),
I went to my former school to pick my slip but they told me, its not there. So I'm here requesting to inform me on reasons why my slip isn't at my center yet i saw my results on phone.

Yours faithfully,
NDAWULA DEUS LAWRENCE