SASCOC is not aware of any athletes whose National Federation has applied for national colours and has not received the colours. SASCOC processes such applications provided all required documents have been submitted.
Prescripts of the National Colours Regulations are very clear that the onus is with the National Federations to submit colours applications to SASCOC.
This question is relevant to National Federations not SASCOC as athletes belong to National Federation and NFs, as per their selection policy, determines those who qualify for colours.