Back In Stock via Messenger

Customer service was good when I contacted them about the app not working with the Safari web browser. Unfortunately the only solution they had was to disable the feature on Safari. And then we discovered that while the plug in showed up on our other browsers (Chrome and Facebook, and on an android phone), it doesn't actually work to subscribe anyone. The button did nothing on the customer side and nothing showed up on the backend. I have no idea how many people attempted to sign up for a back in stock alert that didn't work.

Send a message for assistance and have not received a reply. Will show up as send alert to messenger but instructs customer to check a check box that does not exist. Would have loved it if there was any support from developers.