If you were charged for Omvana by Apple iTunes after purchasing a subscription within the Omvana app on an iPhone or iPad and would like your money back, you must contact Apple directly. Only Apple can process these requests for purchases made through an Apple iTunes account.
You can contact Apple Customer Support directly at https://getsupport.apple.com/. When you get to this page, click "Billing & Subscriptions" followed by "Subscriptions & Purchases." Once here, you'll be given a variety of avenues through which you can contact Apple.
We also recommend that you cancel your subscription to prevent being charged again next cycle. To do so, you'll just need to turn off auto-renew within your phone's iTunes account settings. Omvana is not able to manage this for you on our end, but the steps are easy and you can do it at any time. Please see this support article for details: http://support.apple.com/kb/ht4098.