In app purchase does not work – Trail Tracker GPS - Running, Hiking, and Cycling Review

I’ve had this app for almost 2 years and paid for it at that time. A recent update fails to recognize the purchase and the app behaves as if it is the demo version and prompts for payment. The contact web page returns an error thus I am posting this message in the iTunes review section in the hope that someone will respond.
Review by Fiddle Dork on Trail Tracker GPS - Running, Hiking, and Cycling.

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