If your ads are showing up in the wrong currency, it is most likely because the country selected within your phone settings is set to something outside of North America.
To change these settings so that the correct currency is shown please use the instructions here to adjust your setting if you are on an iOS device. If you are using an Android device, try following these instructions here .
If these instructions don't address your question or if you need anything else at all, email us at flippsupport@flipp.com or by using the Contact Us form.