Well, sadly I believe that the real problem here is Rightstuf. Now hear me out before you say I didn't read first. And the problems I've suffered with Rightstuf… Yeesh.
When you order from Sentai, the packages ship from the same location (I believe it's actually the exact same address as memory serves me) as Rightstuf from Grimes, IO. I honestly believe that Sentai has an agreement or a contract set up with Rightstuf for Rightstuf to act as their warehouse (so that they do not have to expend money on buiding a warehouse of their own). Rightstuf pulls from their own inventory but ships the packages in boxes labeled and stamped with Sentai (boxes eeriy familiar in appearance to Rightstuf boxes). Those damages are guaranteed damages from Rightstuf where quality and customer service has dropped substantially in the past years. Sentai will definitely advocate on your behalf with Rightstuf to fix the problems, but seeing all the issues I've endured with Rightstuf, you might be out of luck for weeks. And usually if Rightstuf replaces a disk, they ship it in a cheap clear dvd case, giving you only the disk and nothing else. I hadn't had any issues with my Sentai orders in the past, but I'm guessing Rightstuf is getting too comfortable with the deal and getting sloppy on those deliveries. Just my two cents.
They never did replace all my damaged disks. It was half-assed customer service, which is what I come to expect from Rightstuf. It's even worse that Rightstuf is essentially the largest anime distributor/warehouse in America...practically the only one...and this is the quality of service we get from them. We really need a competitor to rise and challenge them. They have gotten too comfortable and we are paying for it.