Thanks for reaching out about this.
Have you tried logging in to your Shopify admin, and creating the listing on the Exchange Marketplace app on an incognito mode or a private browser window? If the issues still persist, you can also try to create your listing from another device altogether, just so that we can rule out any browser or caching issues.
If you're able to successfully create your listing using one of the methods above, chances are you'd need to clear your browser's cookies and cache on your usual device or browser.
If you're still running into issues however, you can reach out to our internal Support Team so that we can take a closer look at your account. While we're not able to provide any account-specific support via the Shopify Community at this time, we'd be happy to assist you further. Please visit our Help Centre here, and login to your account to create a support request.
I also thought I'd send you our document on Exchange Marketplace here, so that you can double check your listing eligibility, in case this is something that is preventing you from being able to list your store successfully on the Exchange Marketplace app.
Let me know how you go with the information I've laid out above! I'd be happy to help if you have any other questions.
Thanks for getting back to me, @empirekitchen, and for trying the steps I suggested.
As mentioned, to look into the issue further we do need you to reach out to our internal Support Team so that we can take a closer look at your account. The issues you're experiencing with the Help Centre, in not being able to start a live chat, sounds like a potential caching issue with the browser that you are using. So if clearing your browser's cookies and cache doesn't help, you can also try logging in to your store on our Help Centre through a different web browser altogether, or a completely different device, as well as on incognito or private windows to rule out any browser issues.
When using an incognito mode, if you're still experiencing the same issues, you can check if you've disabled your browser extensions, as these can also impact on your browser performance. You can also ensure that the web browser you're using is up to date on the latest version.
If after going through the above steps you're still unsuccessful, you can try another internet connection, for example by switching to a cellular network on a phone rather than using wifi.