Don't think you're being ignored. This is a relatively quiet board, and by and large we tend to concentrate more on general computing (and other technical) stuff than on eBay - specific software. This is often better dealt with on the general boards, if only because queries receive more views, and there's a better chance of finding someone who has experienced the same problem and resolved it.

That said, a bit of  a search suggests that problems with eBay apps tend to result, in the words of the song, in more questions than answers.

A couple of thoughts.

Perhaps your eBay app is not compatible with the updates applied to your Android operating system. Have you tried installing the latest version of the app itself? It might just work better with the updated system.

I see it was updated recently (26th July). More information here and a download available here:

https://play.google.com/store/apps/details?id=com.ebay.mobile&hl=en

Is it essential to use an "app," or could you list via a supported browser just as you would on a conventional computer? Firefox for Android seems to available here:

https://play.google.com/store/apps/details?id=org.mozilla.firefox&hl=en

Hope you find a solution. If you do, perhaps you might take a couple of minutes to post back and say what you did. This could be of great assistance to others.

Best of luck!