I'm having that problem right now, and trying to get a refund from a seller. I'm suspecting the seller has done something on their end to avoid giving me a refund. I'v done nothing but follow all the required procedure, but when I tried to do another reply to them that message all of a sudden came up :Your account is not authorized to use this feature due to your account status. And now I can't use the reply feature at all for any messages! How do you fix this??? I'm not using the app, my laptop. I really still think it's the SELLER who had some kind of option to report me from their end to avoid communicating and giving a refund! Even though I did absolutely nothing to facilitate that. Really annoyed that these fraud sellers get to have their way and rip people off!! They have tried everything to avoid giving me a refund on a product that stopped working in less than 1 week! I wasn't even allowed to send it back to them! They asked me to do a video of it broken and I did! No response!  I think they're in China too. And I never order from there, only locally. They lie on here!!