That sale is over.
And I do not know which pack you mean, as there is only one pack that was 4.99 of the two you linked, and that had a 50% discount clearly stated on page. If you bought it at a discount for 2.5 it will be in your library and you can access it. It will even say so on top of the page, that you bought it with a discount.
The other page was 1.50. Not 5. It now is 3.00. So still not 5. If that changed, maybe discounts are applied for individually priced files.