Problem with Calculating / Estimated Delivery Date (Wrong date, 30 days period!!!)

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Hello,
This is insane!!!

First of all, I'm having a problem with estimated delivery time calculation, which is happening to all my listings and eBay is setting estimated delivery time up to a 30 days. Instead of 4-5 business day delivery estimation.

It's been a while since I have not seen fast and free icon for any of my listings. For this reason I keep losing a lot of potential orders.

Secondly, this problem is happening from early September. I was trying to keep Ebay customer service updated regarding the issue, talked at least 30 different representatives, but the actual result for every of my calls was a promise that technical department would take care of that, which unfortunately never happened.

When I became a top rated seller plus my handling time is 1 business day to all items listed, which is a way less than my competitors, but after my investigation I'm the only seller with so long estimated delivery.

Any help would be really appreciated, possibly someone else had any / same type of issue.
Thank you

P.S handling time is 1 business day to all items listed and USPS First Class shipping service (Most of them)

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