Well, if you have the email, just reply to it and re-open the conversation and see what happens. If you can explain it correctly, they might be able to research

Well, if you have the email, just reply to it and re-open the conversation and see what happens. If you can explain it correctly, they might be able to research if the bug indeed existed and was fixed. I did a follow up on a bug that I submitted before the whitehat program was in place and that I never got a response on. They looked up the bug, replied to me and paid me. Very diligent.