I'm so sorry you're having trouble. Let's see if we can get your issue resolved.
We'd be happy to provide you with a refund. All refunds must be processed directly through Apple or Google. Below are links with instructions on how to request the refund. Also, I would love to work with you to understand what problem you had, so that we can improve our product for future users. Would you be able to explain the problem, so we can fix it in the future? I'd be happy to send you a free guide for a future trip for your time.
Apple App Store - iPhone or iPad
http://www.imore.com/how-to-get-refund-itunes-app-store
Google Play - Android Phone or Tablet
https://support.google.com/googleplay/answer/1050566?hl=en&ref_topic=6046221