It sounds like the woman wasn’t supposed to be tested to begin with because she isn’t a key worker:
Then she said “hang on a minute, are you a keyworker or a frontline worker?” I explained that my daughter was a keyworker and she said “you will never receive your results”.
So I’m assuming her own swab was never tested as she didn’t meet the criteria? This paragraph:
The woman said she wanted to make sure that other people are aware that if they are keyworkers they will not get their test results.
Is bullshit because again the woman in question isn’t a keyworker!