By the way, there are companies which offer door-to-door service for TM47. It's not cheap though. Someone posted about it in this group once, I think it was 2K bahts, which is the price of the fine.
Reaction to your EDIT: Next time, don't wait until the grace period, in order to prevent such situations from happening. Tip: You can do it by mail 15 days before the date is due. A single visit to the post office / cost is less than 80 bahts in stamps.
Only one document per category. This means you have to merge all your documents into one single PDF per category. You will likely have to compress it too, as it's max 3MB per document.