Hello, please make sure that you're using the latest version 3.9.1, because you're reaching out from legacy version 2.5.7. Can you please send us your ticket number so that we can investigate your report? Also, purchases and refunds are handled via Play store and you're protected.
4.0.x - Added SmartGuard - comprehensive online security tool designed to block intrusive ads, trackers, and malicious websites that can compromise your privacy and steal your information.