I contacted support. They said when a low fee is paid using coin payments the ordering system times out after 1 hour and a username and password is not generated. They are working hard to fix all customer issues and will compensate all customers who have had issues.
They also told me they are taking on more support staff to handle support requests they have been extremely busy since zcash price went up as demand for services has been great. You can email directly to
support@zcash-cloud.com instead of using the live chat service. Staff aim to handle all support emails within 24 hours.Support told me that at some points they have so many people on the live chat system that it crashes and the whole server needs rebooted.They have just repeated the fact that more staff are being taken on and everything will be fixed and made good.
I have been in contact with zcash cloud alot and they have offered me a moderator position on the new forum that will be open in the coming weeks