Thanks for getting in touch. The good news is that the Evernote Team responded to my email. However, they have now asked me 3 times to provide them detailed explanation of the problem, what I have done and what was the result. I have a more than full time job and haven't had a chance to resend essentially the same information. I sent screen shots of setting, hardware/software details etc. EG signed out on iPhone, deleted app reinstalled re signed in, was asked by evernote app to allow push notfications, said yes and still doesn't work.
Interestingly a reminder to a task did pop up on my desktop Evernote but not on my iPhone. Actual tasks with due date and time do not illicit an alert on either iPhone or desktop.
Basically I'm using Reminders (apple) for tasks now until I find enough white space to send evernote another email.