All purchase transactions are handled by the respective app store. RadarScope does not control any of the purchasing process. The app is subject to the purchasing terms and conditions of the app store from which it was purchased.
Depending on the app store used to make the purchase, you may be able to get a refund from them directly:
Follow these instructions from Apple's help site to request a refund.
Follow these instructions from Google Play's help site to request a refund.
Follow these instructions from Microsoft's help site to request a refund.