Can't remove "restocking fee"

[natajest]

After applying a new eBay policy chasing sellers to remove the restocking fee from the listings the option to change a restocking fee on older listings dissapeared and even after reviewing a Return policy of the listings the restocking fee persist.

I tried to review the listings one by one and to review in a bunch - no change.

Even making a new listing based on a older one (with restocking fee) preserve the restocking fee from being removed.

Is there any way to remove a restocking fee in a bunch using any third party tool?