Amai PreOrder Manager + Notify

Customer service leaves something to be desired. They did not respond to my message (the pre-order app stopped showing on our site for no apparent reason) for something like 6 hours. By the time they responded the business was closed. I responded back in the morning and was chatting with an attendant when I was logged out of the admin Shopify for our business. It took 10 minutes to get it back up and running and in that time the attendant at Pre-Order closed our conversation and is not responding despite making me wait hours to get them to respond in the first place. So I'm left with no chat and no working pre-order button. There's no apparent phone number to call either. Very frustrating.