Why does Amazon show such contempt to its sellers?

I opened a case a while ago. It is about our inability to use some of our UPC codes that are licensed to us by GS1. After several rounds, and after providing our GS1 prefix certificate, our cooperate papers, and our brand USPTO certificate, I was finally advised that the code was cleared, and we should have no problem using it.

Our case was for 14 UPC code. The solution was given only to the first of the list.

Nevertheless, when we listed our next product, we entered that first UPC code for the product identifier.

Same problem. Error code 8541. Conflicting with exiting ASIN XYZ1234. I reopen the case on December 18th.

On December 24 we get an email:

…that if you are the owner of the brand you are selling make sure to provide: A copy of the certificate issued to you by GS1 showing your legal entity and associated GTIN prefix.

- Proof that the legal entity on this certificate is related to your brand, such as a trademark registration or a website that displays your products or brand and its relationship with the UPC or EAN owner. We only consider official websites owned by the brand, manufacturer, or the UPC or EAN owner. The affiliation should be clearly called out.

We already did that. Several times! They even said that the problem is resolved. We are now back to square one.

The runaround giving to sellers for simple easy to fix problems is very disrespectful on its own.

But this is not the main issue with my post.

Our first response to this reopened case was on December 24 at 5:17 P.M.

We got a reminder the same evening at 9:20 PM, and a second reminder on December 25, at 5:29 PM.

On December 26, at 5:32 AM, we got an email saying in part that:

Because we haven’t received a response from you, we assume that your issue is resolved. We have now closed this case.

I understand that seller support is overseas in a different time zone. I understand that Christmas may not be a big deal over there.

But where is a little sensitivity from the higher ups? Does cooperate in Seattle not understand that almost all businesses are closed on Christmas eve after 5:00 PM? Do they expect us to reply to business matters between 5:17 PM on Christmas eve, and the early predawn hours of the morning after Christmas?