Black mould on the bread 5 days before it's BB date

I buy about 4 to 5 loaves of bread every week and mostly Albany. I bought bread at a filling station on the 28th July with BB date 02 August, the next day 29th and after consuming a few slices my son found the next slices to have a black mold, this was 4 days before the BB date. Never buying the Albany bread and I was wondering why one of the filling station in our area don't sell their bread, now I know why. How can a bread as fresh and soft as the one I bought have black mold, NEVER AGAIN