Blocking/cancelling Zero Feedback bidders

[dover.magic]

After I got stiffed by a couple zero feedback bidders ["ZFB's"], I no longer want them bidding. Mainly because what I sell are kinda like "drops" with the best results occurring within a very limited time frame. Waiting for ebay to let me cancel and relist a non-payer is no help. Item goes stale
AND, according to ebay's own "buyer management>> buyer requirements page (https://www.ebay.com/bmgt/buyerrequirements) I should be able to block any ZFB who may be winning. See screenshot below:  "currently winning or have bought ...." (not "and have bought..."). 

Every time I enable that setting, it somehow gets turned off , I get ZFB's and I have to go and cancel them manually. And even when I turn it back on, I STILL get ZFB's 

1 - So far I have only been able to cancel ZFB's on the desktop, butnot my android app. Anyone know how to do that on the android app?

2 - Is there any other easy way to keep ZFB's off my items? I clearly state in descriptions "Do not bother bidding if you have no feedback score. Bids from zero-feedback buyers will be cancelled!"  but they still pop up like weeds. If someone cant even follow those simple instructions, then clearly they cant be trusted to follow through on purchases
3 - Att: "Mentors" - WHY doesn't the setting keep ZFB's off my items?? Why have the setting if it is not going to do its job? I have spoken to countless tech support folks, and no help whatsoever :'( 

Thanks

[dover.magic]

That is the only payment requirement available. You can see all my options here

[eburtonlab]

That payment requirement is for best offers. Don’t you have another line for auctions?

There was such a line, but eBay removed it.

https://community.ebay.com/t5/Selling/Buyer-Requirements-page/m-p/34304854

https://www.valueaddedresource.net/ebay-quietly-removes-payment-method-required-for-auctions/

[wooden_flower]

@eburtonlab 

Wow, I missed that one.  That is a shame.

[dover.magic]

Ebay offers way more protection for buyers than sellers. Ironic, since it is the sellers from whom ebay gets its revenue. Ebay and Stubhub used to be related. No more. But on SH, nobody can effect a purchase unless they have a valid payment method on file. That method is charged on purchase, so no getting stiffed for sellers. Clearly the technology exists, too bad ebay chooses not to utilize it for auctions, so that anyone winning an auction is automatically charged and seller gets paid immediately