Covid19

My cousin works for Usave or shoprite in Johannesburg Brixton, it's a new branch, one of the staff members test positive for covid19, now my cousin was chased away she and 2 other staff members who were in contact with the lady who tested positive from the store instead of testing them to see if they might hav contracted the virus, now they are told in 3 days if they dont submit a negative result they not going to get paid, now isn't it in the regulation to test all staff if they hav a case of covid19, now the branch manager said they won't pay 4 any tests to be done on the 3 staff members who were in close contact with the positive lady, is this the correct way of dealing with the problem please help.