This is something we’re getting a lot of feedback on lately. Many of the cases are a situation where the seller has dozens of earlier messages and simply haven’t bothered to respond. Not ideal for those left hanging and we’re looking at ways to make it easier to respond in bulk, e.g. where an item has been sold. However, from some of the replies here it seems there are also technical issues adding to the problem. If you’re not receiving chat message notifications either on the site or via email, or if you are finding any other issues PLEASE let us know via email@example.com, including a screenshot if possible. @RomP apologies for the slight hijack, but hopefully we can solve any broader issues that might be contributing to the problem you’re facing.