u/Jarpwanderson

I recently sold a blu-ray and sent it tracked 48 large letter. The mailer is 32 cm length x 24 cm width which fits inside the large letter sizing and it's only thin (around 1.8-2). Pretty much what I always use.

But after a few days, I've checked tracking and they're asking my buyer to pay 3.50 for delivery. This is 100% wrong.

Anything I can do here?