Please help! Apple Support Support is MIA Every app that I have in TestFlight returns with this message, I have attempted to contact developer account support that they have not returned any messages. It’s been over a week. “The requested app is not available or doesn't exist”

Does anybody know how to contact the Apple ads department? I am running some ads for some of my iPhone apps. I have run into a problem with my credit card and I’ve been trying for over a week to contact somebody. Nobody has returned my messages from the developer account portal. There does not appear to be any other method of contacting them.